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
Scrolling to line, when comming from plugin and the file is was modified.
Since there we dont know from the position data if the symbol on position is the right one,
we scroll to the line if modified.
Andreas Stallinger