spawned python processes

[ink1]

Hi, thanks for creating miso and making it available through pypi. Installing it is trivial. However there is a problem. In our setup, we are not using the default python 2.6 but rather python 2.7. pip does the right thing and installs miso where it should be. And miso can be started correctly. A problem happens when miso wants to start a python process and it tries starting it using python (ie 2.6) rather than python2.7. As a work around, we can inject python2.7 as python into the invironment but this is not ideal.

[MatthiasLienhard]

This is still an issue, I got a syntax error on run_miso.py, line 54 print "Error: No GFF %s" %(gff_index_filename) since python3 has become the default on our system.