Added symboler json to res
Added icons for automatic pages flipping
refs #805
Added icons for display buttons usable in json
refs #805
Added widgets module with button bar and tile source stab
refs #789 #790
Added launching app module for symboler
refs #792
Defined style properties for symboler
Moved tlo pola tekstowego to css folder
refs #806
Removed some hollow things from json
Added some imports in launcher and widgets
refs #805
Added dims according to the project
Changed mx stack to mx frame
Added ratios to menu header
refs #805
Added symbols many-to-many database model
Added interface functions for inserting, getting and linking symbols and categories
Used sqlalchemy
Created module database manager for this purpose
refs #795
Merge branch 'master' into symboler

Conflicts:
	pisak/launcher.py
Added slider widget
Added slider to json
Added symboler specific slider
Added css placeholders for slider
refs #790 #805 #806
add symbols for symboler to res/symbols, ones that Przemek uses
refs #780
Added is_disabled method to Scannable interface
Changed subgroup generator to nonempty-only
refs #803
Added collapsing of singular groups
refs #804
Symbol text nullable
Added nullable preview path column to category
refs #795
Get symbols and cats through omr for consistency
refs #795
Added symbols data loader
refs #808
Non default arg before default arg in db manager
refs #795
Merge branch 'symbols-sqlalch' into symboler-integration
Merge branch 'symboler' into symboler-integration
Integrated symboler elements
Moved general aperture to pisak widgets
Informed viewer widgets about aperture relocation
Moved import from launcher to symboler app
Connected data source to symboler pager
Set tile color in symboler tiles source
Replaced symboler slider class with style class definition in json
Fixed tabs and spaces mix in symboler json
refs #812