Implemented image upload api functionality.

 - Images are uploaded to a folder specifiled in local_setting.py file (see local_settings_template for example)
 - The view uses special file names generator which allows to avoid duplicates
 - Database schemachange included.

Refs, #152
Fixed small typo in code comment
Merge branch 'live' of github.com:OlegYarosh/pin into live
Merge branch 'live' of github.com:mygetlist/pin into live
Merge branch 'live' of github.com:OlegYarosh/pin into live
Layout changes
configure index.html layout
Merge branch 'live' of github.com:OlegYarosh/pin into live
Manage properties Image API method. #216
Categorize Image API method. #215
new feature method (first part) query in Image APIs
merging
'query' method in Image APIs
Query category Image API method. #213
Merge branch 'live' of github.com:OlegYarosh/pin into live
Added PIN_NEW_DAYS variable in config
Method for receiving hashtags for Image API. #212
Fixed method responsible for creating absolute urls (used urlparse instead of concatenation)
Added ProfileInfo api view, which returns profile information without requesting any access tokens
Added API method which allows to query boards by user_id