resolves #137 turns section numbers on in user manual

- changed toc2 to toc
- added toclevels=2
- cleaned up a few links
- moved several sections to enriching doc part
- cleaned up section titles and nesting levels
Merge pull request #139 from graphitefriction/user-sectnum

resolves #137 turns section numbers on in user manual
resolves #140 adds compatibility info to appendix A of user manual

- adds brief intro
- adds icon to indicate compatibility file
- adds {n} ref to table
- updates attribute and value status
- enabls table to function outside of user manual
Merge pull request #141 from graphitefriction/compat-file-attr

resolves #140 adds compatibility info to appendix A of user manual
resolves #142 makes install and upgrade directions same thru docs

- changes examples dir to _includes dir
- adds _includes dir attribute to applicable files
- creates install and upgrade include file
- creates text editor include file
- removes installing and using AsciiDoc from most docs
- updates pdf usage links to asciidoctor fopdf repo
Merge pull request #143 from graphitefriction/install-include-file

resolves #142 makes install and upgrade directions same thru docs