Allow the packager to work with podspecs from private specs repos
Merge branch 'master' into feature/private-sources

Conflicts:
	lib/pod/command/package.rb
Use source URL instead of 'master'.
Test for --spec-sources parameter.
Ensure only the master repo is used by default.
Merge pull request #37 from CocoaPods/feature/private-sources

Allow the packager to work with podspecs from private specs repos