removing unnecessary import; HTTPError is unused
fixing copy-and-paste artifact
misspelled comment
copyright years
Placed quotation marks around all URLs in the example commands.
Merge pull request #86 from oufeidong/master

Placed quotation marks around all URLs in the example commands.
Merge pull request #84 from brainwane/master

usarname -> username (misspelled)
Merge pull request #88 from brainwane/launchpad-cleanup

Launchpad backend cleanup
Punctuation, formatting, capitalization, and wording improvements
punctuation
Design rationale for APIs vs. screenscraping in backends
readme