init Filter model
foundation for filters
slider prototype
select and from/to filter widgets prototypes
nothing important (just testing css)
filter editor for dev purpose
Promisify all model controllers and added filter value retrieval remote method
Ignore lib folder in root
Merge branch 'feature/filters' of https://github.com/Klickrent/klapi into feature/filters
attribute editor (dev purpose)
Merge branch 'feature/filters' of https://github.com/Klickrent/klapi into feature/filters

Conflicts:
	common/models/widget.js
add LocalisedStringArray type
Fixed bug where an object was sent to allChildren method instead of a string as an id
Switch from code to identifier as identifier field for attribute objects
Switch from code to identifier as identifier field for attribute objects
Switch from code to identifier as identifier field for attribute objects
first version of manufacturer filter
fix typo
slider css change
filters css