Base class/interface for read/write buffer locking.
New read/write locked array buffers.

Currently implemented:

- ArrayBuffer: generic superclass to manage internal array creation and
  resizing.
- FloatBuffer: simple subclass of ArrayBuffer for float[].
- Float2DBuffer: Subclass for float[][] that has overrides resizing and clearing.
Removed unused imports.
First try at ReadWRiteLockCollection
Realized I should write a simpled locked collection object first.
New ReadWriteLockCollection.

Now uses a LockCollection internally to manage a set of read and write locks.
POM update.

No longer depending on snapshot of us.rm-testing.
Comment updates.

Updated some javadoc comments and added copyright/license info.
Updated POM parent.
[maven-release-plugin] prepare release us.rm-concurrency-0.1.0
[maven-release-plugin] prepare for next development iteration