Added reset of tokens when editor content is reloaded (#337).
Added commandbar prototype for file navigation (#31).

Added using editor color settings for the command bar.
Added positioning for the command bar.
Added lines between rows in the command bar.
Added a panel to serve as frame substitute on OSX/Linux.
Updated commandbar colors to match the rest of the colors.
Updated commandbar to use a different type of sizer.
Fixed separators between commandbar lines.
Updated commandbar to use different handling on OSX/Linux than on Win.
  wxTextCtrl in wxFrame doesn't get focus on OSX and Linux; seems to be a
  known wxwidgets issue: http://trac.wxwidgets.org/ticket/11948.
  The workaround is to use wxPanel instead of wxFrame, but it requires
  a bit different handling and positioning.
Added restoring focus after change in selection.
Updated commandbar fonts to use editor settings.
Updated commandbar fonts and separators.
Set commandbar selection to 'none' by default.
Removed logging messages from commandbar processing.
Added displaying the list of current tabs for commandbar (#31).
Added fuzzy search for files in commandbar (closes #31).
Added file preview to commandbar (#31).
Added preview on first selection in commandbar (#31).
Fixed mouse selection in commandbar on Linux (#31).
Disabled notebook 'freezing' in commandbar on OSX (#31).
Added setting explicit focus on preview tab in commandbar (#31).

This is to fix a strange issue with the cursor in the text control on the
commandbar being in the wrong location (on Windows).
Updated commandbar to show relative file names (#31).
Fixed commandbar positioning on OSX/Linux (#31).
Removed unused parameters in commandbar handling (#31).
Updated fuzzy matching to better work with short file names (#31).
Added caching to improve commandbar performance on large folders (#31).
Updated based on static analysis results.
Added handling of line numbers in command bar (#31).
Updated command bar preview to work with line number navigation (#31).
Added line navigation to `Navigate` menu (#31).
Moved commandbar/Navigate menu to `Search` (#31).
Decreased penalty for case mismatch in fuzzy search (#31).