Improve HTML escaping

This closes a couple of potential exploit scenarios.
Backtick (`) for older IEs and equals (=) for unquoted attributes.

Refs 83b8e846a3
Closes https://github.com/janl/mustache.js/pull/388

Removed html syntax highlighting on README.md example

Unpin chai and eslint versions

greenkeeper.io will let us know if the minor/patch bumps break our code, so go wild.

Remove IE8 from zuul test runs

Extremely minor documentation update

Update zuul to version 3.7.0 🚀

http://greenkeeper.io/

Update eslint to version 1.7.3 🚀

http://greenkeeper.io/

Update chai to version 3.4.0 🚀

http://greenkeeper.io/

fix indent error in switch-case statement

Update eslint to version 1.7.2 🚀

http://greenkeeper.io/

Update README.md with proper grammar

Past tense of "run" is "ran", not "runned".

Update eslint to version 1.7.1 🚀

Update my username :)

http://greenkeeper.io/

Update eslint to version 1.7.0 🚀

http://greenkeeper.io/

I'm sorry. :see_no_evil:

Linting CLI tool & fixing its current style issues

Also minor .eslintrc change to be able to use `process.exit()`,
instead of having to `throw new Error()` to exit the process.

Add partials support to cli

Add instructions install on top #493

fix local install

Fix order section and grammatical

Fix the comments

Fix command line mustache

Updated eslint to version 1.6.0

http://greenkeeper.io/

Updated chai to version 3.3.0

Updated eslint to version 1.5.0

Use latest v2 release of npm as the just released v3 doesnt seem to be node v0.8 compliant atm.

And test on node v4 for obvious reasons.

Fix spelling error to "aforementioned"

Verbose hooks install

:v: colorified
https://github.com/janl/mustache.js/issues/462

:v: Add empty line between variables and loop, Change "executing" to "Installing", Add new line at the end of the last echo
https://github.com/janl/mustache.js/issues/462

:v: Removed trailing \n, echo changed for if
https://github.com/janl/mustache.js/issues/462

:v: added the word backup into the text.
https://github.com/janl/mustache.js/issues/462

Modified echo text
https://github.com/janl/mustache.js/issues/462

This fixes a small blooper introduced in a3f4339.
Error message thrown for invalid template type, should be equal on
the server and in the browser.

Clarifies and improves language in documentation

* Although my previous PR (#469) on this topic was merged, it caused
  [quite a discussion](https://github.com/janl/mustache.js/pull/469) about
  the clarity of the language I wrote.
* This commit seeks to clarify and improve the sentence under discussion.