Merge pull request #3 from RuiAAPeres/master

Extracted the color & date formatter methods from Liquid.h to a proper category
Moving "Utility Categories" to "Categories"

I'm moving this because I usually avoid spaces on file names.

Signed-off-by: Miguel M. Almeida <miguelcma@gmail.com>
Use NSDateFormatter+ISO8601 category in LQ* classes

Signed-off-by: Miguel M. Almeida <miguelcma@gmail.com>