Issue #145: Python version (conservancy/kallithea)

[Grzegorz Krasoń]

New issue 145: Python version
https://bitbucket.org/conservancy/kallithea/issues/145/python-version

Grzegorz Krasoń:

Most of the files contain following header:

```
#!python

#!/usr/bin/env python
```

which some environments may resolve to python3 (as for example in ArchLinux). You may consider using 

```
#!python

#!/usr/bin/env python2
```

instead. For consistency - you may also want to replace

```
#!python

#!/usr/bin/python
```

by the same header as mentioned before.