6935172: Optimize bit-twiddling in Bits.java Summary: Transformations to reduce size of bytecode Reviewed-by: sherman Contributed-by: Based on an idea by Ulf Zibis <ulf.zibis@gmx.de>

6934271: Better handling of longer utf-8 sequences Summary: Various cleanups, including clever bit-twiddling Reviewed-by: sherman

6933322: Add methods highSurrogate(), lowSurrogate() to class Character Summary: Add public variants of methods Surrogate.high, Surrogate.low Reviewed-by: okutsu, sherman Contributed-by: Ulf Zibis <ulf.zibis@gmx.de>

6934270: Remove javac warnings from Character.java Summary: Use generics and conform to coding style Reviewed-by: sherman Contributed-by: Ulf Zibis <ulf.zibis@gmx.de>

6963749: Minor improvements to Character.UnicodeBlock Summary: Fix surrogate area docs; make source more readable Reviewed-by: okutsu, sherman Contributed-by: Ulf Zibis <ulf.zibis@gmx.de>

6940381: Wording improvements for String.indexOf, String.lastIndexOf Summary: Make wording of javadoc clearer and more consistent Reviewed-by: sherman

6937112: String.lastIndexOf confused by unpaired trailing surrogate Summary: Rewrite lastIndexOf for performance and correctness Reviewed-by: sherman Contributed-by: Reviewed by Ulf Zibis <ulf.zibis@gmx.de>

6934265: Add public method Character.isBmpCodePoint Summary: Move isBmpCodePoint from sun.nio.cs.Surrogate to Character Reviewed-by: sherman Contributed-by: Ulf Zibis <ulf.zibis@gmx.de>

6934268: Better implementation of Character.isValidCodePoint Summary: Use the cleverest possible bit-twiddling micro-optimizations Reviewed-by: sherman Contributed-by: Ulf Zibis <ulf.zibis@gmx.de>

Merge