Removing link to missing templates-overview page
Install plugin with npm

The header suggests downloading first (maybe this implies cloning the repo?) but the remaining docs follow the installation docs from the main readme: https://github.com/assemble/assemble/blob/master/README.md#getting-started
Missing comma
Now instead of not
Link to conslidate.js
Link to YFM
Missing backtick
Updated link to Grunt docs
Working links to Grunt docs
Merge pull request #18 from tschaub/typos

Doc typos