Merge branch 'doubleview'
m
Merge branch 'master' into polobranch

Conflicts:
	examples/cheatsheet.md.hints
	plugin/editor/editor.py
added kwargs to 'render' method in all HintsRenderer subclasses
Merge remote-tracking branch 'origin/master' into doubleview
Implemented filtering by tags.
added 'edit_all_hints' command
set layout delimiter to 0.6
Merge remote-tracking branch 'origin/master' into doubleview
Corrected error in __str__ method in class HintFile wich didn't allow to print filenames with non-asscii characters.
Corrected error in HintsRenderer.load_file(). Now if full_path is None then exception is raised. Earlier if path was None then merhod returned None and execution of render() method continues. That allowed to execute all HintsRender command for scratch views.
Created control menu wich can run double view, browser view and all hints editor.