Renamed interface.xsl|css to feed.xsl|css
SolverRun: Extracted logic to SelectionCandidateProvider and merged rest into BacktrackingSolverRun
0install add-feed: fixed exception on empty <feed-for>s
Avoid string concatenation and boxing for implicit .ToString()
Avoid boxing of enums
Minor tweaks and cleanups
Model: Turned VersionPart and VersionDottedList into structs
Added support for template variables in ImplementationVersion and Released
Publish.WinForms: Added .xml.template to known filters
Updated dependency: Newtonsoft.Json
Added ReSharper team-shared settings
Fixed handling of version restrictions on <runner>s

- Tweaked Restriction.Normalize()
- Fixed Runner.Clone()
- Fixed Command.Normalize()
SecureStore: Tweaked event log access (avoid creating log entries longer that 32k)
Redesigned FlagUtils and RecipeUtils to handle directory renames
Use FeedUtils.Encoding everywhere