Rename the learning puppet nav snippet
Convert learning puppet to the "new" sidebar nav layout

Should have done this a year ago. :)
LP: Revise ral.markdown

- Get to action sooner
- Clarify and reduce
- Mention live mgmt
- PE download call-out
LP: revise Manifests chapter, and add example manifests

- Mention puppet agent much much earlier!
- Punt apache example
- Front-load page with action
- Improve explanations
- Add call-out to DL PE
LP: Revise "ordering" page

- Improve examples and explanations
- Move apache exercise to ordering chapter; it was badly placed in "manifests"
- Add example files
- Add call-out for PE download
LP: Add apache exercise answers
LP: Update variables chapter

- Minor edits
- Get to action faster
- Add many links to Puppet reference manual
- Add call-out to PE download
- Add answer to NTP exercise and build env exercise
LP: Update modules1 page

- Rewrite text for great justice
- Add examples of NTP class
- PE download callout

Still missing:
- Example NTP module
- Answer apache module
LP: Revise templating chapter

- Move things around
- Fix some errors in the main templating guide
- Standardize on instance variables
- Improve the example for virtual machines
- Add PE download call-out

TODO:
- Get the examples extracted into files, inc. multiple versions of the NTP module
LP: Update definedtypes chapter

- Fairly minor edits (this one was in okay shape.)
- PE download call-out
- More links
LP: edits to class params chapter

- change name
- update messaging about class params, based on what we've learned since the early 2.7 days
LP: Barest possible clean-up of agent/master section

This section needs a rewrite anyway, so we'll put that off for now.
LP: Rearrange index text
LP: Tweak page titles
Merge branch 'lp_updates'