remove dependency on py2exe & pywin32

[BigBlueHat]

Not even sure if this is possible...but I'd happily type python couchapp to avoid all these dependencies.

I'm installing via pip install couchapp...so maybe I'm biased against an .exe download....

[BigBlueHat]

According to @benoitc these are only needed for building the executable for Windows. However, I "tripped over" them when installing this via pip (which I need to try again and document).

Regardless, these bits should be as separate as they can be, so they don't get in the way of folks who want to use pip to get things going.

[iblislin]

I can confirm that py2exe is a build only dependency, but it seems that pywin32 is required by utils.py?

[waryhermit]

Would switching to cx_freeze to make exe's be better?