get rid of most clazy warnings (https://github.com/KDE/clazy)
* range loop use refs
* qcolor ctor with ints
* missing Q_OBJECT macro
* use .constfirst instead of .first
enabled ccache for unix systems for fasterr recompiling
* if ccache is in path we use it now
* improved comment colors in all color schemes
* improved contrasts for dark color scheme
* fixed error locations stay visible when activating file in single file view
* removed scroll speed change listener from search autocompletion because it caused slowdown on macOS
* fixed bounding rects of graph edges to contain arrow
* fixed tooltip list shown with just one element
* use canonical filepath cache in cxx indexer
* made constructors of FilePath explicit
* use FilePath at more places instead of string
* forward declares FilePath wherever possible
* Show namespace or filepath in second line of search autocompletions
* Add filepaths relative to .coatidb location
* Rescore matches to acknowledge line split
* Fixed SearchMatch type to be drawn always visible at right edge
* Fixed crash on undoing aggregation edge
* Avoid mutex locking in logging classes when logging is disabled
* Readded dark color scheme
* Fixed font size of type label in autocompletion list
* Fixed text drawing in autocompletion list
* Only give camelcase score when no noletter score was given
* Added MessageShowErrors to undo stack
* Select error line in table when undoing MessageShowErrors
* Notify user about new Plugin in description of From Visual Studio project setup
* Fixed row height of Project File Location label in project setup
* show analysed nodes as bundles in graph
* ellide node names longer than 50 chars
* sort nodes alphabetic in these bundles
* show stats of analysis in code
* error are displayed as well in overview
* added keywords overview and error
* project description can be set in .coatiproject file
* description can include links to symbols using [symbol] syntax
* updated documentation
* increased toc nesting in documentation
Eberhard Graether