Correct the README.md descriptions

Drops the 'from git' from many of the elements. This implies
that the elements always use git... which they don't if
you are using packages.

Also, expands many of the descriptions to say 'and configures' since
most of these elements also contain the OAC/ORC scripts to actually
configure things as well.

Change-Id: I3cbf80c99cfedd73770c9d24e140b7d2443f0dda
Combine policy installs into one operation

Installing multiple SELinux custom policies in a single operation
saves time.

Change-Id: I187fb19c02b4de1c1aed7e1ba9122296af08fba8
Merge "Correct the README.md descriptions"
Merge "Combine policy installs into one operation"