Improve checks for python. Print python version and path to log.

Conflicts:
	src/core/misc.cpp
	src/core/utils/misc.h
	src/gui/mainwindow.cpp

src/core/misc.h

@@ -83,6 +83,7 @@ namespace misc
 #endif
     int pythonVersion();
     QString pythonExecutable();
+    QString pythonVersionComplete();
     // return best userfriendly storage unit (B, KiB, MiB, GiB, TiB)
     // use Binary prefix standards from IEC 60027-2
     // see http://en.wikipedia.org/wiki/Kilobyte