Update c3.js and c3.min.js

c3.js

@@ -1418,6 +1418,11 @@
             tooltip_init_show: false,
             tooltip_init_x: 0,
             tooltip_init_position: {top: '0px', left: '50px'},
+            // default additional tick padding
+            tick_text_padding: 0,
+            tick_text_h_to_w: 1.76,
+            // used when size is not available yet
+            default_tick_width: 30,
             // caching
             shouldCache: true
         };
@@ -4487,7 +4492,7 @@
                 tickWidth: config.axis_x_tick_width,
                 withoutTransition: withoutTransition,
             },
-            axis = c3_axis($$.d3, axisParams).scale(scale).orient(orient);
+            axis = c3_axis($$.d3, axisParams, $$).scale(scale).orient(orient);
 
         if ($$.isTimeSeries() && tickValues) {
             tickValues = tickValues.map(function (v) { return $$.parseDate(v); });
@@ -4527,7 +4532,7 @@
     };
     c3_chart_internal_fn.getYAxis = function (scale, orient, tickFormat, tickValues, withOuterTick) {
         var axisParams = {withOuterTick: withOuterTick},
-            axis = c3_axis(this.d3, axisParams).scale(scale).orient(orient).tickFormat(tickFormat);
+            axis = c3_axis(this.d3, axisParams, this).scale(scale).orient(orient).tickFormat(tickFormat);
         if (this.isTimeSeriesY()) {
             axis.ticks(this.d3.time[this.config.axis_y_tick_time_value], this.config.axis_y_tick_time_interval);
         } else {
@@ -4727,7 +4732,8 @@
     };
 
     c3_chart_internal_fn.getMaxTickWidth = function () {
-        return 10;
+        return (this.config.maxTickTextWidth || this.config.default_tick_width) +
+               (this.config.tick_text_padding || 0);
     };
 
     c3_chart_internal_fn.updateAxisLabels = function (withTransition) {
@@ -7988,7 +7994,8 @@
     // 2. ceil values of translate/x/y to int for half pixel antialiasing
     // 3. multiline tick text
     var tickTextCharSize;
-    function c3_axis(d3, params) {
+    // $$ is passed to save max tick width in $$.config
+    function c3_axis(d3, params, $$) {
         var scale = d3.scale.linear(), orient = "bottom", innerTickSize = 6, outerTickSize, tickPadding = 3, tickValues = null, tickFormat, tickArguments;
 
         var tickOffset = 0, tickCulling = true, tickCentered;
@@ -8143,6 +8150,29 @@
                     var tickPosition = scale(d) + (tickCentered ? 0 : tickOffset);
                     return range[0] < tickPosition && tickPosition < range[1] ? innerTickSize : 0;
                 }
+                
+                // Seek a specific value in the stylesheets of a document
+                function getStyleValue(selector, property) {
+                    var css, rule, sheet, value;
+                    for (var styleId = 0; styleId < document.styleSheets.length; styleId++) {
+                        sheet = document.styleSheets[styleId];
+                        for (var ruleId = 0; ruleId < sheet.cssRules.length; ruleId++) {
+                            rule = sheet.cssRules[ruleId];
+                            css = rule.cssText;
+                            if (css.indexOf(selector) !== -1) {
+                                if (css.indexOf(property) !== -1) {
+                                    try {
+                                        value = css.split(property)[1].split(':')[1].split(';')[0];
+                                        return value.trim();
+                                    } catch (e) {
+                                        // Error will be caught in case of incorrect CSS
+                                        return undefined;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
 
                 text = tick.select("text");
                 tspan = text.selectAll('tspan')
@@ -8150,12 +8180,24 @@
                         var splitted = params.tickMultiline ? splitTickText(d, params.tickWidth) : [].concat(textFormatted(d));
                         counts[i] = splitted.length;
                         return splitted.map(function (s) {
-                            return { index: i, splitted: s };
+                            return { index: i, splitted: String(s) };
                         });
                     });
                 tspan.enter().append('tspan');
                 tspan.exit().remove();
-                tspan.text(function (d) { return d.splitted; });
+
+                var fontSize;
+                    
+                tspan.text(function (d) {
+                    fontSize = parseFloat(getStyleValue('.c3-axis-y .tick', 'font-size'));
+                    if (d.splitted.length) {
+                        $$.config.maxTickTextWidth = Math.max(
+                            $$.config.maxTickTextWidth || 0,
+                            d.splitted.length * fontSize / $$.config.tick_text_h_to_w
+                        );
+                    }
+                    return d.splitted;
+                });
 
                 switch (orient) {
                 case "bottom":