Add technical description of ARM-11: Execution Model

I have not yet written the supplementary sections on testing/evaluation,
alternatives, etc, but I wanted to publish this more widely now that the
technical description is substantively complete so it could get wider exposure
and commentary.

Closes #26.
Fix erroneous mix-up of the link title vs description
Fix numbering in README. GRR.
Add new sections on Content Service and Report Service.
Merge pull request #27 from ahpook/master

Added final service sections to ARM-11 technical writeup.
Update arm-4, start-tag reworked.

This reworks the heredoc start to always use @(), this since
@name is ambiguous (means virtual resource). A second reason is that it
is easier to see that @() is a complete expression that ends at the
closing ')'.
Merge branch 'master' of ssh://git@github.com/puppetlabs/armatures.git
Bump revision to 1.0.0 to move to Submitted state

No refinements have been made yet so I'm declaring this one-point-oh.
Bump ARM-1 metadata to 1.0 in preparation for Submitted state
Update index for ARM-0 and ARM-1 state / version / date
Update arm-4 heredoc to ready for submission of 1.0

Changes the syntax for the heredoc tag to always use the form @(tag).
Update arm-2 to 1.0 status. Updates links to implementation.

The implemntation is now in a puppetlabs puppet repo branch.
Text is added that the RGEN gem is now vendored (included) in the puppet
distribution.
Merge branch 'master' of ssh://git@github.com/puppetlabs/armatures.git
Update README with status of updated arms.
We got pro-forma +1s for ARM-0 and ARM-2, marking them Completed
Initial commit of arm 12 with no text written yet
Write the initial arm 12 proposal
Merge pull request #28 from nfagerlund/star_resources

Star resources
Update README.md
Making it clear that "title" is required for ARMs

Signed-off-by: Luke Kanies <luke@puppetlabs.com>