79-adding-i18n-polish

Added internationalization support with default yml file for Polish language. Also define Polish as default.
Moved I18n config to seperate file in initializers folder.

[#79]
update Gemfile.lock
32 create model Competition

Update competition.rb

32 model correction

Update 20140507090012_create_competitions.rb

32 correction
Merge branch '32-create-model-Competition' of https://github.com/gotar/Internship-range into 32-create-model-Competition