Readibility edits

Readibility copy-edits
Edits for clarity and uniformity

Basic edits for clarity, capitalization, and uniformity.
Merge branch 'master' of github.com:puppetlabs/puppet-docs
Update instructions for installing a module from a release tarball

Remove link to bug, since it has been resolved, and update instructions
for installing a module from a release tarball and disabling the PMT
from attempting to resolve dependencies.
Merge branch 'master' of https://github.com/laurenrother/puppet-docs
Expand the section on features a bit.

It's not exactly clear from the documentation (or the book) that
features can be used to defer resource evaluation, something that can be
extremely useful for certain providers.
Merge pull request #323 from zacharyalexstern/master

Removed inaccurate statement about plugins in modules
Added SSLCARevocationCheck settings

Added the SSLCARevocationCheck setting to the code sample.
Add page on verifying signatures for packages
Add note that we don't sign gems or os x packages
openpgp -> gpg
Remove baseline screenshots from PE 3+

This feature went away.
Revert "Remove baseline screenshots from PE 3+"

This reverts commit fffa02298a22502a03593743212229333f60e979. It turns out these
images are still used somewhere, and Nick should definitely not impulse-delete. :)
Fixes Facter 2.0 sidebar nav include

Links for the facter20 include were relative to top of Facter dir. Made absolute from /facter/2.0
Improve example in the Windows package reference

DOC-50 (comment): Expanded one of the examples to show how
single-valued attributes coexist with key-value pairs in Windows
package install options.
PUP-2421: fix description of stringify_facts

The release notes for Puppet 3.5 incorrectly said that stringify_facts
should be set to false on the master. It should actually be the agents.
Break down PE and Communtiy versions of PuppetDB

This changes the index for PuppetDB to differentiate between community and PE
versions for our older documentation. This avoids confusion that I've received
where we are stating for example 1.6.x community is marked as stable, but in
reality this is only true for PE packages.

This also starts us on the road for making PE more of a first class citizen
in the rest of our documentation.

Signed-off-by: Ken Barber <ken@bob.sh>
(PDB-551) Index for versioning policy

We've added a short note about versioning to our docs, this adds a link to the
doc in our index for both 2.0 and master.

I've also corrected a small typo, whereby our release notes were pointing at
the master version instead of 2.0.

Signed-off-by: Ken Barber <ken@bob.sh>
Move 3.6.0-rc1 references to final
Improve instructions for installing agents without internet connectivity

Add clarification and update link for downloading agent packages