Fix old algorithm2e command and update manual
Update DRAM documentation for eta and epsilon

Also fixed up some comment formatting and linking between
MetropolisHastingsSGOptions and MhOptionsValues classes.
Adding reference to Haario's paper for eta
Tidying up some doxygen niggles

1. Use fewer columns.  Horizontal scrolling on anything but a Mac is a disaster
2. Use short names for the html doxygen pages.  These names are not stable,
   but GitHub doesn't like the long names because a lot of them lead with an
   underscore
Bump version number and fix email address
Add a link to docs in the README
Make queso doc main page contain up-to-date info
Merge pull request #223 from dmcdougall/update-manual

Fix old algorithm2e command and update manual
Merge pull request #224 from dmcdougall/dram-docs

Update some DRAM documentation
Merge pull request #225 from dmcdougall/fix-doxygen

Tidying up some doxygen niggles
Merge pull request #226 from dmcdougall/bump-version

Bump version number and fix email address
Merge pull request #227 from dmcdougall/readme-link-docs

Add a link to docs in the README
Merge pull request #228 from dmcdougall/fix-doc-page

Make queso doc main page contain up-to-date info
Merge branch 'v0.50.1-release' into dev