new Bundles.shallowCopyBundle(from, to, replace) and shallowCopyBundle(from, to, replaceSuffix), as well as .equals(a, b) utility methods.
Added isDeeplyEqual to ValueUtil (used by Bundles.equals)
Improvements to pull request.

- Cleanup apache license headers to match style guide
- Remove "import foo.*" notation to match style guide
- Change implementation of ValueUtil#isDeeplyEqual() to use switch statement
- Do not assume concrete Default* classes in ValueUtil#isDeeplyEqual()
- Added unit tests for ValueUtil#isDeeplyEqual()
remove deepEquals, optimize equals, string equals
rename Bundles.shallowCopyBundle (new methods) to addAll, add javadocs
add parameter docs to second Bundles.addAll method
Merge pull request #5 from addthis/utility-methods

new Bundles.equals and Bundles.shallowCopyBundle methods