Bunch of changes for debian packaging.

- Updated debian/changelog.
- Updated debian/control to remove libmtcp package.
- Added debian/NEWS file.
- Updated debian/rules to reflect new doc files.
- Updated debian/dmtcp.install file.
- Removed unused files.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2724 ba6dc0ae-232f-0410-883f-9ebac64fc565