[TIMOB-15562] Added OS X CLI tools detection. Updated i18n strings.
[TIMOB-15562] Added support for custom executable paths to cli tools detection code.
Merge pull request #60 from appcelerator/timob-15562

[TIMOB-15562] Added OS X CLI tools detection.
Fixed critical bug with cli tools detection failing on Mavericks.
Fixed bug with modules with the same id and version, but from multiple locations being added twice.
Updated i18n strings.
Merge branch 'master' of github.com:appcelerator/node-appc