This change improves performance by (1) Create a cacheing mechanism to cache frequent...

This change improves performance by (1) Create a cacheing mechanism to cache frequently used cached regex (2) Precompile some known regexes. (3) Other misc improvements. It also (1) removes dependency to Guava library (2) creates new interfaces that accept parameters that could be reused instead of immutable ones.

git-svn-id: http://libphonenumber.googlecode.com/svn/trunk@21 ee073f10-1060-11df-b6a4-87a95322a99c