version 0.2.7
- options_manager gained .list argument
- extended support for NULL option values
- Added 'rmarkdown' to Suggests, by CRAN request
- Switched to 'tinytest' test framework

version 0.2.4
- support for limiting option values
- option names that were not defined when creating the options manager are now ignored with a warning.

version 0.2.2
- bugfix: graphs device altered after loading package.

version 0.2.1
- added reset_par(), reset_options()

version 0.1.0
- initial CRAN release
