Merge pull request#145 from hesim-dev/144-cran-failures-piecewise_ex……ponential-indexing-bug-with-timerate-inputsfix: ensure time and rate are same length when using piecewise exponential distribution

Merge pull request#143 from hesim-dev/142-v0.5.6chore: release v0.5.6

Merge pull request#121 from hesim-dev/s3-fixesfix: CRAN NOTEs related to S3 methods

Merge pull request#102 from hesim-dev/v0.5.3V0.5.3

Update site

Bump version number for NEWS

Merge pull request#54 from hesim-dev/websiteUpdate README

Minor update to documentation for onc3 dataset

Set figure width in markov-inhomogeneous-indiv vignette

Rebuild website