Made npm test work on windows w/ mSysGit.

Also took away the path to grunt, npm sets it
(https://github.com/isaacs/npm/issues/2576),
.gitignore: adding grunt-produced test runner
Merge pull request #407 from herby/gitignore-test-runner

.gitignore: adding grunt-produced test runner
Merge pull request #406 from herby/npm-test-on-windows

Made npm test work on windows w/ mSysGit.
Merge branch 'master' into helios