fix(translate.js): Allow blank translation values

Check for translationTable presence in place of boolean eval of values.
Merge pull request #66 from doublemarked/fix-blank-translation-values

Fix blank translation values
chore(): remove angular-cookies.js from karma.conf
fallbackLanguage addition

by adding "$translateProvider.fallbackLanguage("en_GB");", the module will now try to get the english translation  if the translation is missing in the used language
Update translateServiceSpec.js

add test for fallback new functionality
Add grunt-ngdocs task and fix comments
Add docs directory
fix html5mode config for docs
Change endpoint
fix naming
change ngdoc comments for proper generation
add guide section to ngdcos
chore(docs): update guide with wiki content
Improve doc; add nav template for doc
remove scripts; update guide index
add styles for docs; update docs
chore(docs): update api documentation
fix link
chore(docs): more docs
chore(docs): add shell script for automated doc generation