Updated Readme.md to include karma:start on watch task

Current calls for running "grunt karma:unit watch" but should be "grunt karma:unit:start watch" in order to start the karma server.
Update package.json

Needs last version of karma
chore: Add travis support.
chore: Add travis batch.
Merge pull request #66 from karma-runner/travis

Add travis configuration
Merge pull request #65 from kolesnik/patch-1

Update package.json
chore: Add karma as a dev dependency to satisfy travis.
Merge pull request #56 from christianreed/patch-1

Updated Readme.md to include karma:start on watch task
docs(readme): fix typo - 'sarts' to 'starts'
Merge pull request #71 from psyked/patch-1

docs(readme): fix typo - 'sarts' to 'starts'
release 0.7.2
chore(readme): Cleanup.
grunt.util._ is deprecated - replace it with lodash
chore(refactor): use referenced optimist variable

Optimist is assigned to a variable so use it
Merge pull request #77 from dcherman/lodash

grunt.util._ is deprecated - replace it with lodash
fix: Add firefox and chrome launcher as devDependencies.
Merge pull request #86 from eddiemonge/patch-1

chore(refactor): use referenced optimist variable
Merge remote-tracking branch 'upstream/master'