0.5.0-rc3

Changelog

6847aa5 Ensure write-lock for text-format
b5031d3 Fixed line conversion for .cpp/.h
a8ccf12 Inlined didClose method
975d40f Correct handling of textchanges in .cpp/.h
cf3008d Correct handling of diagnostics from .cpp/.h
de600c5 Handling of non-standard $/setTraceNotification message
5446598 Completed refactoring of didChange message handler
a684850 Reorganization of didClose (wip)
525f6a8 Some refactoring of CodeActions handling, still work in progres...