Code cleanup, spelling fixes.

Fix a number of minor items identified by IDEA code inspections.

Replace logger.debug(String.format()) with logger.debug() and templates.

Remove some dead code.

Reformat / optimize imports.
Update for Cassandra 1.2.

This includes a number of changes copied from the original Netflix
version of Priam.
Remove unused and likely broken backup functionality.
Rename core to priam to match Netflix.  Refactor rpm.
Use EC2 utilities to get instance metadata.
Refactor ByteOrderedPartitioner support, simplify token calculations.
Fix bugs/cleanup Cassandra configuration code.
Fix ByteOrderedPartitioner token defaults.
Make manual restore easier w/autoBootstrap configuration setting.
Bump major version to 2.0 since Cassandra 1.2 is a big change.
Cleanup Maven test dependencies.
Code read comments.  Remove unused code, wrap BOP tokens.
Merge pull request #26 from bazaarvoice/cassandra12

Update Priam for Cassandra 1.2 support.