Building with enhanced clang warnings indicated a large number of
instances with the warning:
`warning: zero as null pointer constant`
Recommended practice in C++11 is to use `nullptr` as value for
a NULL or empty pointer value. All instances where this warning
was encountered were corrected in this commit.
Where warning was encountered in dependency code (i.e. external library)
no chnages were made. Patching will be offered upstream.
If the "extra version" is defined (not empty) then it is shown
after the actual version number in the About-dialog.
Ticket: #2164 ([GUI] Add revision info to "About" window)
At first we created the GUI in the code and so needed all the layouts
etc include to the code. Now when we are using UI files we don't need
all those included. So clean them up. Also use forward declarations
instead of includes in header files when possible.
Include guard naming fix (names starting with underscore+capital letter are reserved in C++, so we should not use those)
Codeblocks project file update
Daniel Marjamäki
Oliver Stöneberg
Paul Fultz II
Scott Furry
Lauri Nurmi
Reijo Tomperi
Daniel Marjamäki
Kimmo Varis
Daniel Marjamäki
Vesa Pikki