Use initially declared constant consistently: ANSIBLE_CFG

ANSIBLE_CFG = './ansible.cfg'
Replace remaining references to './ansible.cfg' with ANSIBLE_CFG
Merge pull request #64 from glenjarvis/suggestions/spol

Use initially declared constant consistently: ANSIBLE_CFG
Improve pem file error checking
Merge pull request #67 from glenjarvis/bug/explicitpathrequest_r0

Improve pem file error checking
Update training schedule in README.md
Merge pull request #68 from glenjarvis/feature/update_hands_on_training_schedule

Update training schedule in README.md
Switch order of examples 4 and 5

Showing the command line option -a makes more sense first. Showing a module option '-m' makes more sense after. These examples should have been switched.
Upgrade ansible dependencies to 1.7.0
Add example06 for `setup` module demo
Fix formatting in example 9 output file
Add demo 10 re: Handling / Ignoring errors
Add demo 11 re: registering variables
Add example 12 re: filters
Add demo 13 re: `when` example
Add Demo 14 Combining steps
Merge pull request #70 from glenjarvis/feature/material_changes_in_examples_r0

Feature/material changes in examples