Bugfix

Various bug fixes, details below:

1. fix vc project file generation.	 b13cd5c
Allow mkfiles.pl-generated VC6 project to compile successfully. Tested on VC++2012. 

2. Automatic switching between file and registry storage should be in sy… …	 1f53379
Related to #11, and a few other bugs like: Upon startuop, directly saving a new session will clear the session list, if all existing sessions are from file and hence auto storage type kicks in. 

3. Filter file-based sessions accordingly if session suffix is set.	 15f76f4

4. Fix path bug in deleting session if session suffix is set.	 ccf14e1

5. Handle NULL paramater in error message box.	 b7ccb68
Apr 29, 2013

6. Recognize "transport-usb", "transport-local" and "transport-any" for … …	 c92eb0d
#74