r=preed x2

Initial attempt by jake@bugzilla.org, updated by me
r=joel, preed

r=bbaetz,jouni

r=caillon x2

r=gerv, justdave

Patch by Brad Baetz <bbaetz@student.usyd.edu.au>
r= jake, justdave

Bug 109530 - xml.cgi was quoting stuff way too much.  This is because it was incorrectly quoted in Bug.pm
r= justdave, louie

Also fixes seeing bugs in the buglist (bug 95024), dependancy lists,
tooltips, duplicates, and everywhere else I could see which checked group
bugs.groupset == 0.

Also fxed bug 101560, by clearing BASH_ENV

r=myk,justdave

patch submitted by rufus@nonstuff.de (Rufus)
call QuoteXMLChars on bug_file_loc and attachment desc

logged in yet.  Thanks to luke_harless@attglobal.net for discovering this
one.

add whoid usergroupset comment query to bug data fields
add AppendComment function
add CanChangeField function to check if a person can change a field
add display() for quick dumps of the bug
add Collision to check for midair collisions before changing a bug
added a stub function for changing a bug in the database
init_bug will now take either a userid or an e-mail address as a valid parameter

experimental: Not part of normal bugzilla distibution. Bug.pm creates a bug object and provides methods for getting and setting attributes and for printing out the bug as xml. xml.cgi prompts for a list of bugs and displays the list as html. xml.cgi replaces export_bug.cgi