docs(translateService): documents translate service usage with event handlers

Fixes #200
docs(*): adds docs for shortcuts and links
docs(translateService): fixes typo
docs(guide/ru): Use $translateChangeSuccess event with $translate service
docs(guide/uk): Use $translateChangeSuccess event with $translate service
Merge pull request #240 from DWand/cyr-translations-support

Ru/uk translations support (Use $translate successEvent with $translate service)