Add a dev-setup.sh script

I created a dev-setup.sh script for testing the setup instructions from
@asmacdo. It was originally intended just to run through all his steps to test
his doc but it may be generally useful for new contributors to help them get
started quickly.

The script should work on RHEL 7+, CentOS 7+, or Fedora 19+. There is one line
that is hard-coded for Fedora 20 but it can go away once we push Pulp 2.5.1
alpha into the testing repo.

This commit also has a couple of step order fixes to the document.
Automatic commit of package [pulp] release [2.4.3-0.1.beta].
Automatic commit of package [pulp-nodes] release [2.4.3-0.1.beta].
Merge branch '2.4-testing' into 2.4-dev
Merge branch '2.4-dev' into 2.5-testing

Conflicts:
	nodes/pulp-nodes.spec
	pulp.spec
	rel-eng/packages/pulp
	rel-eng/packages/pulp-nodes
Merge branch '2.5-testing' into 2.5-dev
Merge branch '2.5-dev'
Bumps qpid-server release to qpid-cpp.0.26-9
Merge pull request #1242 from beav/setup-doc-update

Add a dev-setup.sh script
Set the version to 2.4.3-1.
Set the Nodes version to 2.4.3-1.
Automatic commit of package [pulp] release [2.4.3-1].
Merge branch '2.4-testing' into 2.4-dev
Merge branch '2.4-dev' into 2.5-testing

Conflicts:
	nodes/pulp-nodes.spec
	pulp.spec
	rel-eng/packages/pulp
Merge branch '2.5-testing' into 2.5-dev
Merge branch '2.5-dev'
Merge pull request #1249 from bmbouter/1119744

1119744 - Bumps qpid-server release to qpid-cpp.0.26-9 which should fix this bug
Automatic commit of package [pulp-nodes] release [2.4.3-1].
Merge branch '2.4-testing' into 2.4-dev
Merge branch '2.4-dev' into 2.5-testing

Conflicts:
	rel-eng/packages/pulp-nodes