gitignore update
Ruby/Rails downgrade

Due to Ruby's bug with the assets and ActiveAamin not fully compatible
with Rails 4.0.0 yet.

Valeu Markito ;}

$ rails -v
Rails 3.2.13
$ ruby -v
ruby 1.9.3p392 (2013-02-22 revision 39386) [x86_64-darwin12.3.0]