added options in formulas to build universal libs
Merge pull request #8 from kikko/feature-universal

added options in formulas to build universal libs
Add '--universal' option
Update header comments
Modify for the latest Homebrew
Merge remote-tracking branch 'origin/dev'

Conflicts:
	README.md

* Modify formulas for the latest Homebrew.
* Modify version names.
* Add '--universal' option.