[Issue #193] Internationalization aqquired
[Issue #193] added links to change locale in the navbar
Merge branch 'master' of github.com:MGhanem/smartsoft-13 into C4_m0hamed_C5F2_switch_locales
[Issue #193] added translations for the navbar
[Issue #193] Last chosen locale now stored in session to be retrieved later
[Issue #193] Added tests
Merge branch 'rolling_master' of github.com:MGhanem/smartsoft-13 into C4_m0hamed_C5F2_switch_locales

Conflicts:
	arability/Gemfile
	arability/config/routes.rb
Merge branch 'rolling_master' of github.com:MGhanem/smartsoft-13 into C4_m0hamed_C5F2_switch_locales