Update README.md

Corrected spelling of word and eliminated unecessarily repeated word.
Merge pull request #248 from jesuscreyes/cs100-2014fall

Update README.md
Update README.md

Changed "it" to "is" to make better sense of the sentence
Merge pull request #250 from DustinPham/cs100-2014fall

Update README.md
Fixed spelling of "connector" to reflect the two previous uses of "connecter" in the sentence, "The connector is an optional way you can run multiple commands..."
Merge pull request #251 from jstod001/cs100-2014fall

Fixed README.md
Merge remote-tracking branch 'upstream/cs100-2014fall' into cs100-2014fall
fixed everything for now