updated docs for 2.0 for everything but the new command structure
Merge branch 'develop' of https://github.com/stan-dev/stan into feature/issue-211-stan2-manual
updated for distributions with sampling statements in both definitions and index
added formatting to commands with some extra descriptions
command skeletons in place
updated commands after proofreading and fixed in-press ref
Merge branch 'develop' of https://github.com/stan-dev/stan into feature/issue-211-stan2-manual
added new bfgs args, added syntactic highlighting to argument hierarchy
Edits for the command argument doc
fixed typos in doc
Merge branch 'feature/issue-211-stan2-manual' of https://github.com/stan-dev/stan into feature/issue-211-stan2-manual
Merge branch 'develop' of https://github.com/stan-dev/stan into feature/issue-211-stan2-manual
fixed more issues in manual
Merge branch 'develop' of https://github.com/stan-dev/stan into feature/issue-211-stan2-manual
more doc updates for 2.0
Merge branch 'develop' of https://github.com/stan-dev/stan into feature/issue-211-stan2-manual
updated manual with optimization and some more formatting
added more descrptions for optimization and initialization
added citation for Matt trick
Merge branch 'develop' of https://github.com/stan-dev/stan into feature/issue-211-stan2-manual