Changed structure of color themes to include additional tag <colors>; legacy compatible
Changed store of editors to Map to improve getting a specific editor by pluginId
Added mapping information to ColorTheme
More flexibility to parsing functions to be used from external
Added loading of override mapping to ColorTheme definition
Added code to load mapping override(s) from ColorTheme definition
Added new theme 'Sublime Text Monokai Extended'
Added comments in the example theme for mapping overrides