Add 'whichwrap' option and handle 'b,s,<,>' suboptions.
Adapt CharLeft/CharRight tests and add SpaceRight tests.
Document SpaceRight tests.
Refactor GetNextPoint etc. into GetRelativePoint. Use it in SearchService.
Add SpaceLeft tests.
Merge pull request #1226 from ricksladkey/fixes-whichwrap

Support for 'whichwrap' option