2. fixed minor bugs in wxCmdLineParser, underscores and digits are now allows
in the option names
3. made wxGetLocalTimeMillis() public, documented it and other time functions,
added wxDateTime::UNow(), also "%l" format specificator in
wxDateTime::Format()
4. fixed fatal bug in wxTimeSpan::Format()
5. fixed nice bug in wxDateTime::Subtract(wxDateTime) which returned the result
with the wrong sign
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@7664 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775