Removed second and third contexts
Changed access to last context so that it doesn't depend on sequential numerical indexes
Fixed the first half of the docs up a bit. Most spelling, number, and minor
grammatical errors have been patched up all the way to the "tags" section.
Finished first round of edits to the README.
More minor touch-ups, like separating some jumbled words that somehow got
stuck together.
Merge pull request #52 from philipaconrad/master

Improvements to the spelling and grammar of the README.
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' into enhancements