update bullet so it actually works

Moved the addSourceDirectory for physics/Bullet into the Engine/Source/CMakeLists.txt file that way it can actually appear where we expect it to in the solution explorer.

Engine/lib/bullet/data/husky/license.txt

@@ -0,0 +1,22 @@
+Software License Agreement (BSD)
+
+\file      husky.urdf.xacro
+\authors   Paul Bovbel <pbovbel@clearpathrobotics.com>
+\copyright Copyright (c) 2015, Clearpath Robotics, Inc., All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that
+the following conditions are met:
+ * Redistributions of source code must retain the above copyright notice, this list of conditions and the
+   following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the 
+   following disclaimer in the documentation and/or other materials provided with the distribution.
+ * Neither the name of Clearpath Robotics nor the names of its contributors may be used to endorse or promote
+   products derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WAR-
+RANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, IN-
+DIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.