Updating Singularity Documentation.
Make Singularity embeddable into a bigger service.

Adds also an example on how to do it with a skeleton class.

There is probably some more documentation required; I will write some once this has really gelled.
another generic change for extensibility.
fix s3 prefix generation
reverse pause ordering

fixes race condition
don't overwrite tail of log
add configuration reference
tweaks
add mesos settings / TOC
caps
Sort s3 logs
Vagrant service has enableCorsFilter
Update docs
deployment section
Merge branch 'master' into update_docs

Conflicts:
	Docs/Singularity_API_Reference.md
more rework of docs
Merge pull request #314 from HubSpot/update_docs

Updating Singularity Documentation.
Merge pull request #295 from hgschmie/embed-singularity

Make Singularity embeddable into a bigger service.
link updates
Merge branch 'master' into vagrant-cors