Merge pull request #237 from tomaka/master

Update for Rustc
Remove usage of regex
Merge pull request #240 from tomaka/remove-fucking-regex

Remove usage of regex
Point xml-rs to git

Closes https://github.com/bjz/gl-rs/issues/241
Merge pull request #242 from bvssvni/xmlfix

Point xml-rs to git
Use BTreeSet instead of TreeSet.
Merge pull request #243 from serpis/use_btreeset

Use BTreeSet instead of TreeSet.