Add/license disclaimer

- Added license disclaimer to each file.
- Fixed a few Xml param comments

Had a few problems with the (c) copyright symbol encoding, turns out that not ever file is UTF-8 encoded, so changed a few that had problems (still a few files that should probably be changed for consistency, seems like it's mostly the .cpp/.h files that are using code page 1252)

Visual Studio has a handy feature called "Save documents as Unicode when data cannot be saved in codepage", description on how to enable here: http://stackoverflow.com/a/1875622