bump version

bump version

bump to version 0.3.3

Merge pull request #21 from bksaiki/more-miscellaneous

More R4RS functions

Release v0.3.1

Merge pull request #9 from bksaiki/cleanup

Release 0.3.0

Version 0.2.2. See HISTORY.txt for details

Version 0.2.1, see HISTORY.txt for details

Version 0.2.0, see HISTORY.txt for details

Version 0.1.2. See HISTORY.txt for details