Fixed build link

When a new image is created and user clicks "build", then
new target image is being created, but there is no image version
yet for this target image. In this case we create default image version
for asssociated base image.

Fixes #379
Added cucumber test for image building
Merge pull request #395 from jprovaznik/build_link

Fixed build link on image show page
Set configuration for using Gettext
Converting simple t-keys to Gettext format
Add directory locale with basic PO/POT file
Fix user_session.feature scenarios

Fix needed because of different strings
on the username/password recovery page.
Difference is in strings of alchemy helpers(gettext vs rails).
Removed method localized_text_present from general_steps.rb

Also fix all occurance of the method to text_present with
gettext string
Merge pull request #397 from jzigmund/simple_gettext

Gettext conversion - simple t-keys conversion
add factory and test for instance_hwp
add tests for provider selection and cost strategy
Merge pull request #399 from martinpovolny/provider-tests2

add tests for some things related to the cost strategy
Gettext conversion #2 - t-keys with variables
Update POT/PO files with new strings after conversion t-keys with variables
Merge pull request #402 from jzigmund/gettext_with_variables

Gettext conversion part #2 - t-keys with variables