Fix, avoid attempting to find Python2 binary if not using inline copy, and prefer "python2" binary when doing it.

* There is PEP 394 which clarifies that "python2" should exist, it does
  not say where, but I believe "/usr/bin" is a likely place for systems
  that implement it.

* This corrects Issue#95.
Fix, the "inspect" module might depend on the "site" module. Fixes Issue#96.

* This happened at least for Linux, suspected to happen on others.

* Potentially a regression of the last release, where importing of
  the "site" module got delayed into the "__main__" module.
Describe hot fixes in changelog.
Support version bump for hotfix releases as well.
New hotfix release.
Merge branch 'hotfix/0.4.4.1'