Create directory structure for reference manual
Update README.md

Update based on current categorization structure.
Add agent binaries to Components category
Fix titles
Hook examples up, fix some formatting, unify "how to use the examples" text.
Top-level file for What's New in.../Welcome to CFEngine <version>
Remove "Example -" from title.
Some more blanks to fill in.
git ignore
Mass migration of reference docu into proper directory structure
Move common bundles docs into reference.
Add documentation for report_data_select body