Allow plugin loading

Fix NRE due to menu item (seemingly been there a while maybe)

git-svn-id: http://svn.code.sf.net/p/autowikibrowser/code/branches/AWBPluginCS@10037 5227b50d-9349-4574-b055-4b0a7525e11c
Drop ToolsVersion to 4 for non VS IDEs

git-svn-id: http://svn.code.sf.net/p/autowikibrowser/code/branches/AWBPluginCS@10038 5227b50d-9349-4574-b055-4b0a7525e11c
Remove old BMP reference

git-svn-id: http://svn.code.sf.net/p/autowikibrowser/code/branches/AWBPluginCS@10039 5227b50d-9349-4574-b055-4b0a7525e11c