Added tasks for updating docs in gh-pages
test for update:docs
test for update:docs (2)
feat(changelog): Added feature to generate CHANGELOG.md with task `grunt changelog` or `grunt release:prepare`
Added forgotten call `grunt.loadNpmTasks('grunt-conventional-changelog');`
refactor(Gruntfile): to be able  handle 'grunt before-test' task
feat(Gruntfile): Added added task ,checks if branch is clean
feat(Gruntfile): Added task 'grunt release:push'
feat(Gruntfile): Added empty CHANGELOG.md