The repository now contains a clang-format file which should be used when committing new code. Additionally, a new workflow job is added which checks the conformance of source files to the specified formatting rules.
Fixes#47.
* Don't include <QtGui>, which is a leftover from Qt4 and causes literally
everything to be pulled into the TU.
* Use forward declarations instead of includes where possible.
* Replace aggregated Ui* classes with aggregation via pointer, which allows
these classes to be forward-declared and thus further reduce the number of
included headers. Aggregation via pointer has been the default in Qt Creator
for some time now.
* Fix minor warnings reported by Clang.
* Move QnCheckBoxedHeaderView to a separate file.
* Move QtvCodecInfo to a separate file, change initializer list to inline member initialization.
* Create an actual QMake .pro file instead of stuffing it in MXE build scripts.
* Fix 32-bit integers being used as pointers to QtvCodecInfo objects in 64-bit Windows builds.
* Update information in the "About" tab.
The old syntax is essentially based on the "normalised representation" created
by the SIGNAL and SLOT macros, with potential mismatched only being caught at
runtime. The new syntax causes these errors to appear in compile time.
