implement serializers
expose documentation of serializers
implement aggregation
ensure that str are yaml friendly
document aggregation
added reset tag
a little bit of lint
Made the shell shim compatible with AIX.
How to enable custom runners
Add zmqversion grain

Like saltversion, this grain can help show the effective version of a
particular component (in this case ZMQ) that is in use on the running
minion, and help aid in troubleshooting.
Check for None
salt.modules.seed: Don't die due to bad symlinks
Fix --list all option
Merge branch 'seed' into lxc
Fix highstate output

Refs #10945
Merge remote-tracking branch 'origin/develop' into lxc
Fix issue 11020
Added exception and stack functions to the test module
Merge pull request #11018 from cachedout/10982

Fix --list all option
Added load_text filter and import_text tag to Jinja environment