Performance tune-ups

• Change calculation of distance in findbestmatch.GetNonTextControlName()
  so that it does not need to square or get the square root to
  find the real distance - as we only need to compare values - not have
  the actual distance. (Thanks to Stefaan Himpe)
• Compiled regular expression patterns before doing the match to
  avoid compiling the regular expression for window that is being
  tested (Thanks to Stefaan Himpe)
• Made it easier to add your own control tests by adding a file
  extra_tests.py which needs to export a ModifyRegisteredTests() method.
  Also cleaned up the code a little.
• Updated notepad_fast.py to make it easier to profile (added a method)
• Changed WrapHandle to use a cache for classes it has matched - this is
  to avoid having to match against all classes constantly.
• Changed default timeout in SendMessageTimeout to .001 seconds from .4
  seconds this results in a significant speedup. Will need to make this
  value modifiable via the timing module/routine.
• WaitNot was raising an error if the control was not found - it should
  have returned (i.e. success - control is not in any particular state
  because it does not exist!).
• Added ListViewWrapper.Deselect() per Chistophe Keller's suggestion.
  While I was at it I added a check on the item value passed in and added
  a call to WaitGuiIdle(self) so that the control has a chance to process
  the message.
• Changed doc templates and moved dependencies into pywinauto
  subversion to ensure that all files were availabe at www.openqa.org and
  that they are not broken when viewed there.
• Moved all timing information into the timings.Timings class. There are
  some simple methods for changing the timings.