remove ambiguous note, because OS X contains no Qt.

Change-Id: Ic58ed0bd56fbc6c763fb48ca7aa4be760a65748d
add dollar sign to commands

Change-Id: Ief7f3eff50e199b008e655d24c256e7d00df555a
remove an old option from virtualenv

Reason:
- new users get confused by options that are gone from official virtualenv
- old users with older versions know the old options, already.

Change-Id: I5c09660995cb5b45468b887dc82b68d6150a83c8
add notes on defunct OS X options

Change-Id: I3debd50e2c3be0b4365faf09db737a439ab9c8f1
change UNIX to Linux and minor edits

Change-Id: I5642d2c018f0aaabade9902d5b2da00d98f0170a
add a note about multiple distributions

Change-Id: I55146b3df554484f7677e554ba64bdcd54e7571d
simplify wording in the test (i.e. "Windows" is common for "Windows System")

Change-Id: I4b1d5d56c66167a971ceb4eb0bb750033afe29b2
Merge pull request #27 from ctismer/master

working on small enhancements