Join license header with historical commentrs

Join the license header with historical comments using a separator so IDEs can correctly parse the initial header.

Also use .gitattributes to ensure all files are LF.

ui/UIWindow.cpp

@@ -14,9 +14,9 @@
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
 
-/*
+--- HISTORICAL COMMENTS FOLLOW ---
+
  * $Logfile: /DescentIII/Main/ui/UIWindow.cpp $
  * $Revision: 39 $
  * $Date: 5/02/99 2:09a $
@@ -723,4 +723,4 @@ void UITitledWindow::OnDraw() {
 
   ui_SetCharAlpha(m_Title.get_alpha());
   ui_DrawString(m_Title.get_color(), x, y, m_Title);
-}
+}