commitmonitor Code

Store the last-checked revision in a separate variable when fetching the next few log messages so it can be used as the start revision. Also set the last-checked revision to zero so the 'limit' is used.
(Fixes issue #441) : Fetch next 100 inaccurate/does not work

Patch from tret2003, modified and extended by me:
* add a new text box to the url dialog to enter a regex to match log messages to ignore
* ignore all log messages that match the regex
(Closes issue #413) : Text processing description commit

Remove the "using namespace std" statements and explicitly refer to the std namespace where needed.

* add an empty line after the license header
* remove unneeded empty lines at the end of files
* use the right case for the includes
* always use <> for system headers
* update ext/Versions.txt

Increase the max number of log entries to keep to 100000, but keep the default as 1000.
(Closes issue #350) : Higher "Max No. of log entries to keep"

Rename a lot of classes and methods.

Merge the MultiSCCS branch to trunk and fix some minor merge conflicts.

(Closes issue #275) : Ability to monitor commits of certain users

* add a new section in the URLs dialog which takes a list of users to include

convert tabs to spaces.

(Closes issue #103) : "Automatically create diffs of commits" was useful option