remove duplicate code

There was twice a check for the Python version on OSX but the logging in the second step could never be reached.
remove duplicate code

There was twice a check for the Python version on OSX, but the logging in the second check was never reached
Merge pull request #588 from BioGeek/patch-1

remove duplicate code
fix #590
Merge pull request #595 from Atheros1/master

fix #590
Merge with original upstream changes

Conflicts:
	src/bitmessagemain.py