bump version
Keyword changed: grunt-plugin to gruntplugin

The official keyword for grunt plugins is gruntplugin, this is how it can be searched for and how it'll show up on gruntjs.org (it doesn't now).
bump patch version
Added option to specify node `--harmony` flag

Also, you can now specify options.require as either an array or a string.
Merge branch 'sethmcl-master'
add harmony flag and release 1.5.0
move istanbul to peer dependency
warning
move "executeCheck" function outside task to make it re-usable
move needed variable declarations and initializations also outside
declare new multi task 'istanbul_check_coverage'
updated documentation
misunderstood the way istanbul determines the coverage files to check
peerDependencies
Merge branch 'leider-peerDependency' into peerDependency
If Grunts resolved file names, use them

This enables use of eg. Grunts negation patterns to exclude a specific subfolder from the tests
Do not treat lack of test files as a fatal error
Updated README
Merge branch 'voxpelli-use-grunt-file-resolve'
bump version for release