Trim contents of VERSION in case of newline

For consideration: It's easy to add a newline to the end of version and a pain to remember to leave off the newline, so we might trim the contents of `VERSION` instead.

Checked that `lein pom` creates a pom.xml with the correct version string when VERSION has a newline at the end of the file:

* /
* /storm-console-logging
* /storm-core
* /storm-lib
* /storm-netty