added rayleigh distribution with tests and doc in manual
removed extra manual file
fixed headers in manual for rayleigh distribution
decreased number of decimal places in rayleigh tests
used OperandsAndPartials for gradients of cdf for rayleigh distr
stagnant models from bugs volume 2
Merge branch 'develop' of https://github.com/stan-dev/stan into feature/stagnant-model-bugs-vol2
added missing using statement and missing rng test for rayleigh distr
Merge branch 'develop' of https://github.com/stan-dev/stan into develop
all funshapes working, with existing modified so there is no rejection
adding a model test for stagnant2. not adding one for stagnant due to slow convergence.
Merge branch 'develop' of https://github.com/stan-dev/stan into develop
adding tests for the rest of bugs_examples/vol3/funshapes
Merge branch 'develop' of https://github.com/stan-dev/stan into develop
fixes issue 83, disappearing spaces in printed string literals in models
Merge branch 'develop' of https://github.com/stan-dev/stan into feature/issue-83
Initialize HMC variables in mcmc_writer_test
Merge pull request #136 from stan-dev/feature/issue-83

Feature/issue 83. Fixes #83.
adding expected values to the funshapes tests
Merge pull request #114 from stan-dev/feature/stagnant-model-bugs-vol2

Feature/stagnant model bugs vol2