Updates to code documentation, typos, and some removal of old unused code

git-svn-id: http://superputty.googlecode.com/svn/trunk@402 8d6e282c-8220-11de-b77e-d9b456c0130a
Update Issue 204
* Settings for update checking are now saved
* When update check started from help menu will give feedback to user if new version is not found as well

git-svn-id: http://superputty.googlecode.com/svn/trunk@403 8d6e282c-8220-11de-b77e-d9b456c0130a
Updated log4net library to version 1.2.13

git-svn-id: http://superputty.googlecode.com/svn/trunk@404 8d6e282c-8220-11de-b77e-d9b456c0130a