added Creator class for filters
added description field to filter record
basic filter tree structure
added filter box and basic record filter UI (not functional yet; only supporting on-the-fly filters for now)
repalced std::auto_ptr with boost::shared_ptr in filter nodes
replaced binary filter node with a n-ary node
Changed filter mechanism for game / addons

Filters by number of master references, regardless of extension
Implemented combobox for game file selection
Removed master table widget
Removed vertical headers from plugin view
Fixed missing item list in launcher combobox
Created masterproxylist class
Moved init code to master / plugin proxy classes
Began migrating code to ContentSelector base
Removed checkboxes from master list

Moved checkbox code from datafilesmodel to pluginsproxymodel
Continued migration of code to ContentSelector
Reimplemented dependency selection feature

Moved more code to ContentSelector
Added support for omwgame and omwaddon files
added parser and custom filter edit widget (parser not functional yet; always returns a false boolean node)
Fixing row-click selection
Fixed row-selection/check feature