MocNarrowAngleSumming.h: 2011-05-03 Jeannie Walldren - Updated documentation....

MocNarrowAngleSumming.h: 2011-05-03 Jeannie Walldren - Updated documentation. Removed Mgs namespace wrap inside Isis namespace. Added Isis Disclaimer to file.  Removed Mgs scope from unitTest and truth file. 

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@2351 41f8697f-d340-4b68-9986-7bafba869bb8