localize composer toggler help text for zh_CN and zh_TW
cs translation update
cs translation update
extracting some hardcoded title="..." strings
Updated Dutch translation

Both server and client side, except for TOS.
putting "public/downloads" and "public/images" into .gitignore
extracting one more hardcoded title
move i18n of UserActions to JS-side and make sentences translatable (take 3)
Don't show sad face when version checks have not been done yet
Merge pull request #728 from ypxu/localize-help

localize composer toggler help text for zh_CN and zh_TW
Merge pull request #729 from kubabrecka/cs_update34

cs translation update client side
Merge pull request #730 from kubabrecka/cs_update35

cs translation update server side
Merge pull request #732 from kubabrecka/downloads_in_gitignore

putting "public/downloads" and "public/images" into .gitignore
Merge pull request #731 from kubabrecka/extract_titles

extracting some hardcoded title="..." strings
Merge pull request #734 from kubabrecka/extract_title1

extracting one more hardcoded title
Merge pull request #733 from sanderdatema/dutch_translation

Updated Dutch translation
Need to require email in user.rb because specs can start failing when running guard
Add bookmarks and favorites to dashboard stats
Fix for loading uncategorized topics when slug for uncategorized_name is blank
Fix a problem where you might see missing {{sentTo}} value after a failed login