- Documented required version of npm while developing
- Use the latest npm client for node >= v0.8 on travis

Special quirks to get node v0.6 supported:
	- npm client v1.3.26 on travis
	- jshint 2.4.4 as >= 2.5.x breaks

Split the old Writer.renderTokens() into several small functions with a single responsible.

This change allows the AMD define signature to match what common AMD optimizers use to find define calls that need naming.
Also updates the volo package.json entry so that the correct version of mustache can be fetched properly.

Removed cache* functions altogether. mustache.parse is all that's
really needed.

Fixes #321

Fixes #322
Fixes #330
Fixes #331
Fixes #334

Fixes #308
Fixes #285

Fixes #238

This commit allows pre-compiled templates to be executed without
keeping the original template around. It is still required when using
higher-order functions.

Fixes #262

Fixes #274