* Add Statement.unbindColumn and Statement.unbindColumns methods.
 * Keep track of bound columns so that the buffers don't get garbage collected (should fix #9).
Document Statement.setParameterName, Statement.unbindParameters, Statement.bindCol, Statement.unbindColumn, and Statement.unbindColumns.
Merge branch 'master' of https://github.com/lee-houghton/eos

Conflicts:
	README.md