Reviewed-by: xdono

6959197: When building with JAVAC_MAX_WARNINGS=true, the build fails in sun/nio/cs due to the use of -Werror
Summary: Remove unneeded casts, add generic types and make better use of static data
Reviewed-by: sherman

Reviewed-by: darcy, weijun

Summary: Add new method Character.isSurrogate(char ch)
Reviewed-by: sherman, darcy, okutsu

4891024: EUC-KR and JOHAB converters need to be updated to include two new characters
4287467: Character converter generator tool
Summary: Migrated some of the doublebyte charsets to the new implementation.
Reviewed-by: okutsu

6639450: IBM949C encoder modifies state of IBM949 encoder
6569191: Cp943 io converter returns U+0000 and U+FFFD for unconvertable character
6577466: Character encoder IBM970 throws a BufferOverflowException
5065777: CharsetEncoder canEncode() methods often incorrectly return false
Summary: Re-write 11 IBM doublebyte charsets. Thanks Ulf.Zibis for the codereview!
Reviewed-by: martin