Improved sanitizing of configuration names which have a number prefix.
[Gemspec] Update molinillo dependency to `~> 0.1.0`
[Gemfile] Remove libxml2

This has no longer been a dependency of Xcodeproj
Move master repo checks to its own method
Ensure master repo setup in search
Update changelog
Merge pull request #2719 from CocoaPods/libxml2

[Gemfile] Remove libxml2
[CHANGELOG] Clean up entry from #2563
[Command] Remove unnecessary `.parse` implementation
[Gemspec] Update Xcodeproj dependency to `~> 0.20.0`
Drop support for Ruby < 2.0.0
[bundle] update
[profile] Add KCacheGrind profile printer with `.callgrind` extname.
[Travis] Run on all Ruby versions that come with 10.9 and 10.10.
Merge remote-tracking branch 'origin/master' into number_prefix_preprocessor_definitions
Improved sanitizing of configuration names which have a number prefix.
Merge pull request #2700 from HeEAaD/number_prefix_preprocessor_definitions

Improved sanitizing of configuration names which have a number prefix.
[CocoaPods/CocoaPods#1249] Separate header paths for different targets in .xcconfig files.
Test scoped header store per platform
For #1249
[CHANGELOG] Updates for #1249