removed unneeded loadNpmTask

handled by load-grunt-tasks at line 11
fixed "grunt test" running tests twice

specified karma to only run task "unit" rather than not specified, when
it defaults to all tasks
added notify for all tests passed

crated notify task and 1 subTask under it named testsPass
optimization for travis

removed cleaning of server before running tests, since it's always a
clean install on the travis
update grunt-notify version