First attempt at abstracting ZeroMQ communication.
Complete abstraction of ZeroMQ.
incron state: rm unused import

************* Module salt.states.incron
salt/states/incron.py:44: [W0611(unused-import), ] Unused import os
salt/states/incron.py:47: [W0611(unused-import), ] Unused import salt
salt/states/incron.py:49: [W0611(unused-import), ] Unused import _needs_change
incron module: rm unused import of random

************* Module salt.modules.incron
salt/modules/incron.py:9: [W0611(unused-import), ] Unused import random
yumpkg5 mod: rm unused import of `re` module

************* Module salt.modules.yumpkg5
salt/modules/yumpkg5.py:10: [W0611(unused-import), ] Unused import re
Merge pull request #9384 from cvrebert/patch-1

incron state: rm unused imports
Updated the contents.rst so it pulls in more info from the topics, added some preliminary data for the master/minion docs so it stops erroring, did not delete the relevant sections from the main index.
Made some more updates to the master and minion troubleshooting docs to get rid of errors.
Merge pull request #9385 from cvrebert/patch-2

incron module: rm unused import of random
Merge pull request #9386 from cvrebert/patch-3

yumpkg5 mod: rm unused import of `re` module
Merge pull request #9388 from gravyboat/develop

Updated contents.rst, added to minion/master troubleshooting.
Add quick paragraph about needing compiler

A compiler is required to build M2Crypto, this commit adds a short
paragraph as a reminder of this fact.
Update sentence describing the getting started guides
Merge pull request #9391 from techhat/clouddocs

Update sentence describing the getting started guides
Review Fix for @westurner and @thatch45 changes on dockerio doc
Merge pull request #9392 from makinacorpus/fix-doc

Review Fix for @westurner and @thatch45 changes on dockerio doc
adds IPv6 lookup to dig module
Again, more robustness for zcbuildout tests
Fix docs for salt.state.archive

Example sls is under-indented.
Merge pull request #9396 from makinacorpus/buildouttest

Again, more robustness for zcbuildout tests