Generic fix for double caret generation

In an html file, when you would type md- nothing may have happened. When you would type <md- you got the snippets menu showing md- at the top, which is fine. Now, when you clicked it, you may have ended up with a snippet that started with 2 carets: ``<<md-...`. That should be fixed now.

More updated directives including datepicker by https://github.com/Stephn-R

• better contact chips
• simple md-content
• datepicker and divider
• md-grid list and tile
• md-highlight-text updated
• new md-icons snippets
• input container

More work done by https://github.com/Stephn-R

• Three snippets for md-chips are consolidated into one super md-chips snippet
• added some commits
• more options for md-card
• updated autocomplete directive with options
• updated md-checkbox snippet
• certain pieces are required + consolidating chips directive

Growing up a little thanks to https://github.com/Stephn-R

• all options for md-button covered
• more md-button options
• placeholder py file for versioning
• added a CHANGELOG and a CONTRIBUTING file
• enforce editor line spacing

Fixed md-grid-list directive

Merge pull request #4 from mess110/patch-1

use corretct tabTrigger for md-grid-list directive

All directives are now available

0.1.0

Reinstate link to material docs

First service snippet added

Merge pull request #1 from ceetee/feat-mdSidenav-snippet

add $mdSidenav snippet

More directives added. Not done yet. Pull requests are welcome

0.0.2

instruction for collaborators

First release. Just one snippet there.

Everyone is invited to add more snippets. Here's the list of directives that need to be implemented as snippets
https://material.angularjs.org/latest/#/