Fix TOC and next/previous buttons using Liquid 2.2.2.
DOCS-8: Kiji project README's should point to the jira.kiji.org

Added a "Contributing Documentation" section which covers the entire
lifecycle of a change from a fork, jira, change, and pull request.
DOCS-10. Improve consistency of file names, tutorial section titles, and bulleted list in tutorial overview.
DOCS-7. Spell check corrections.

Signed-off-by: Aaron Kimball <aaron@wibidata.com>
Move kiji-schema API docs to apidocs/kiji-schema/<version>.
Add hadoop-configurator API docs.
Add hbase-maven-plugin API docs.
Add apidocs index.
Remove hbase-maven-plugin api-only docs.
re-add hbase-maven-plugin site.
Remove unnecessary indentation.
Multi-version support for userguides.

Modify homepage links to use v1.0.0-rc2.
Add a 1.0.0-rc2 copy of the userguide.
Move the existing userguide to the userguide/1.0.0-rc1/ dir.
Update the previous/next buttons to only thread within the same 'version'.
Update the sidebar toc to only enumerate pages in the current version.
Fix apidocs link to use proper 1.0.0-rc2 link.
Add index of user guide versions.
Update tutorial for 1.0.0-rc2.
Update user guide for 1.0.0-rc2.
Update header bar to 1.0.0-rc2 for release.
Add KijiSchema 1.0.0-rc2 javadoc.
Add annotations-1.0.0-rc2 javadoc.
Add kiji-delegation-1.0.0-rc2 javadoc.