Also fix a few README formatting issues.

        mvn org.apache.rat:apache-rat-plugin:0.11:check -D rat.numUnapprovedLicenses=5000

Rename README file to README.md file for the following DB bindings so the build process can generate binding specific tar balls for them. (currently they are broken because the build process looks for README.md)

dynamodb
hypertable
mapkeeper
nosqldb