Added possibility to negate a station name


git-svn-id: http://casacore.googlecode.com/svn/branches/nrao-nov12@21350 6afa274c-0927-0410-9b47-a1284d797885
Improved documentation


git-svn-id: http://casacore.googlecode.com/svn/branches/nrao-nov12@21351 6afa274c-0927-0410-9b47-a1284d797885
Added support for coverage

git-svn-id: http://casacore.googlecode.com/svn/branches/nrao-nov12@21352 6afa274c-0927-0410-9b47-a1284d797885
Script using lcov to get test coverage

git-svn-id: http://casacore.googlecode.com/svn/branches/nrao-nov12@21353 6afa274c-0927-0410-9b47-a1284d797885