Fixed typos.

[HTML5] Add a hook to run linters agains staged git files

[HTML5] Add support to default system/browser language

[HTML5 Client] Transition from Grunt to NPM Scripts

[HTML5] - Userlist Accessibility Fix

Meteor's ROOT_URL and HOME variables can no longer be changed in the config file (the npm script needs to be modified instead).

This commit applies the following 2 changes:
- Removes the preinstall NPM command that installs Grunt (we don't use Grunt anymore)
- Makes sure Meteor database is reset before the client starts up in production mode

Those values are now in .npmrc file.

npm start command does exactly the same thing, so we don't need the Shell script anymore.

This commit removes everything that is related to Grunt, since we can now use NPM instead. Particularly, it does the following things:
- Removes the Gruntfile
- Removes the text file containing Grunt instructions
- Uninstalls all the Grunt-related packages

This commit allows NPM to run the client in development and production modes using all the Meteor-related configs.

Run client in development:
NODE_ENV=development npm start
or
npm start

Run client in production:
NODE_ENV=production npm start

The default rootURL is http://127.0.0.1/html5client. This can be changed in .npmrc.
If prodHome is specified in .npmrc, then its value is used as Meteor's $HOME.

This commit slightly modifies the start script: we don't need to jump to another directory to run start.sh. It also introduces two modes of running the client via npm scripts: default mode (development) and production mode. I only introduce the npm scripts setup, the modes don't differ from each other yet.

Minor updates to the README.md

HTML5 - fixed long string at cc box

[HTML5 Client] Initial Acceptance Tests Setup

[HTML5] String refs to callback refs

Merge remote-tracking branch 'origin/x0-userlist-accessibility-bug-fixes' into x0-userlist-accessibility-suggestions