fix the mis-typed function name `blue` in example code
Fixes #710: Empty block with CSS syntax
Added: base-convert built-in function
Added: base-convert test cases
Forgot to include actual function :)
Merge remote-tracking branch 'origin/patch-5' into dev
Merge branch 'master' of git://github.com/LearnBoost/stylus into dev
add reference to renderer for use in BIFs
use() built-in function

simple pass-through to style.use(), allowing the use of Stylus plugins from within Stylus code.
Merge branch 'master' of git://github.com/LearnBoost/stylus into dev
Merge branch 'master' of git://github.com/LearnBoost/stylus into dev
Added optional argument to image-size function for ignore errors. Fixes #738
imporoved for loop documentation to include list range example
Removed: unecessary casting from base-convert() BIF
Removed: non-standard parameter assertion for second parameter to base-convert() BIF (base)
Added: standard parameter assertion for first two parameters for base-convert() BIF (num, base)
url(): custom mime mapping support
url(): custom mime mapping support (fxd)
Fixes #839 Comments interfering with multiline support
Fixes #810 Inline comments break with class declarations
More useful testcase
Fixes #873 json BIF returns literals for colours
formatting