Merge pull request #123 from rrthomas/master

Make 'npm test' work
Move installation instructions to the wiki
Fix some comments and white space; remove some dead code
Fix a comment typo
Fix some language in comments and strings
Ignore test-generated files
Make cps-selectors command take a real typeface
Make naming of selectors argument more consistent
Fix various typos and some whitespace
Non-functional skeleton of an interpolate command