Add the scripts used to build the LMS AMI

There is still a lot of fiddly manual work that needs to be done. Next
step is to clean that up and automate it end to end. This work can be
abstracted and reused for the virtual classroom.

When done, I'll put in a document with usage instructions.
Fix the color reset in the ZSH prompt.
Merge pull request #318 from klynton/master

Fix the color reset in the ZSH prompt.
Merge pull request #316 from binford2k/wip/lms_builder

Add the scripts used to build the LMS AMI
Configure irssi & hosts on the master and student

This avoids the proxy resource duplication and avoids over classifying
the student's secondary nodes.
Merge pull request #320 from binford2k/fix/proxy_resource_duplication

Configure irssi & hosts on the master and student
fix for TRAINVM-111 -- backup hosts and network before install and restore on failure
Merge pull request #322 from GeoffWilliams/classroom_setup_hosts_backup

fix for TRAINVM-111 -- backup hosts and network before install
Reimplemented the proxy work

This must have been lost in a previous commit. I cannot find it.
Merge pull request #323 from binford2k/fix/reimplement_proxy_work

Reimplemented the proxy work
Add default .gitignore to the $workdir repo

This commit adds a simple .gitignore file to the $workdir repository
(~root/puppetcode) that ignore Vim swap files.  This is to avoid
confusion or potential unexpected attempts to do syntax validation
against those files.
Better glob for gitignore
Merge pull request #324 from joshbeard/add_gitignore

Add default .gitignore to the $workdir repo
Update ssl reset script

Use puppet cert generate instead of requiring the user to ctrl-c
Back up certificates with timestamps so it's non destructive
Clarify the agent cert regeneration message
Add a file_line resource (ugh) to fix the session lifetime.
Upgraded all modules.

Almost all of the modules here are outdated so I’ve upgraded all of
them to the current version as of today: 2014-08-16.
Remove redundant 'mkdir -p' since next line does it, too.
Merge pull request #327 from fnaard/ticket/TRAINVM-118/remove_redundant_mkdir_p

Remove redundant 'mkdir -p' since second line does it, too.
Merge pull request #326 from klynton/session-timeout

Add a file_line resource (ugh) to fix the session lifetime.
Merge pull request #325 from binford2k/update_ssl_reset_script

Update ssl reset script