added some new functions from shflags; increased output from some helpers

git-svn-id: http://shunit2.googlecode.com/svn/trunk@344 0b216afc-fc4a-0410-87c2-ade1b7cef105
Issue #30: fixed error checking of assertTrue()

git-svn-id: http://shunit2.googlecode.com/svn/trunk@345 0b216afc-fc4a-0410-87c2-ade1b7cef105
only show output from showOutput() if not skipping

git-svn-id: http://shunit2.googlecode.com/svn/trunk@346 0b216afc-fc4a-0410-87c2-ade1b7cef105