Updated readme to reflect correct sln file name

Added build3/vs2010 to .gitignore

Author: Sanchit Garg

.gitignore

@@ -1,5 +1,6 @@
 /bin
 /build3/gmake
+/build3/vs2010
 /build_cmake/
 
 *.pyc

README.md

@@ -48,7 +48,7 @@ All source code files are licensed under the permissive zlib license
 
 **Windows**
 
-Click on build_visual_studio_vr_pybullet_double.bat and open build3/vs2010/0MySolution.sln
+Click on build_visual_studio_vr_pybullet_double.bat and open build3/vs2010/0_Bullet3Solution.sln
 When asked, convert the projects to a newer version of Visual Studio.
 If you installed Python in the C:\ root directory, the batch file should find it automatically.
 Otherwise, edit this batch file to choose where Python include/lib directories are located.