Unset the `CDPATH` env variable before shelling-out. #1694
Merge branch 'master' of github.com:CocoaPods/CocoaPods
Test and documentation for issue #1694
Fix :head option for Pods from HTTP source.
Fail with a helpful error if :head is unsupported.
Test that helpful error message is actually displayed.
Added changelog entry for pull #1960

Cleanup pod directory when download fails (probably due to a network error)
Merge pull request #1969 from alexrothenberg/patch-1

Added changelog entry for pull #1960
Updated CHANGELOG for #1958
Merge pull request #1972 from neonichu/master

Updated CHANGELOG for #1958
Stub out the actual downloading.
Update changelog for #1704, #1840 & #1933
Merge branch 'fix_head_download_option' of https://github.com/neonichu/CocoaPods into neonichu-fix_head_download_option

Conflicts:
	spec/unit/installer/pod_source_installer_spec.rb
Merge pull request #1973 from dlackty/changelogs

Update changelog for #1704, #1840 & #1933
Stub HTTP requests in lint spec
Make SourcesManager ignore some global git configs
Change spec so that it would cause a rebase.
Added specs for testing if git options are present
Merge pull request #1978 from neonichu/master

Make SourcesManager ignore some global git configs
Updated CHANGELOG for #1978