commitmonitor Code

Before using the project name in a path, convert all special chars.
This fixes issue #35.

If no author or date is available, show "(no author)" or "(no date)" instead of an empty string or a bogus date.

Don't try to convert a date string if the string is invalid.
This fixes issue #34.

Update to neon 0.28.1

Speed up the loop by moving ListView_GetItemCount() outside the loop.

When selecting a project in the tree control and filling the revision list control, ensure that the first unread item is visible.
This implements issue #31.

Use the write access to the log data when checking for unread items: the read only items could be out of date.

Fix build of scintilla.

Update to Scintilla 1.75

Improve the diff function if TortoiseSVN is installed:
* if TSVN is installed, add a second entry to the log list control context menu for diffing with TSVN.
* if TSVN is installed, the default diff uses TSVN.
* to get the unified diff again (if TSVN is installed), the log list control context menu entry "show unified diff" has to be used.

This implements issue #13 (kind of).