Fixed a couple small grammatical errors.
Fixed a couple small grammatical errors.

1. "If a pull request is not to be considered for merging (yet), please
prefix the ..."

2. If a particular commit references another issue, please add the reference. For
example: `refs #1234` or `fixes #4321`.
Conflicts:
	CONTRIBUTING.md

chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin