Reviewed-by: darcy, weijun

Summary: override the canEncode() in ISO2022_CN_CNS
Reviewed-by: martin

Summary: Updated the US_ASCII and ISO-8859-1 to fix the failure.
Reviewed-by: alanb, martin

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

Summary: Putback the files missed in last putback
Reviewed-by: alanb

6229811: Several codepoints in EUC_TW failed in roundtrip conversion
Summary: Re-write EUC_TW charset to address the size and roundtrip issue.
Reviewed-by: alanb

6636319: Encoders should implement isLegalReplacement(byte[] repl)
Summary: optimized new String(byte[], cs/csn) and String.getBytes(cs/csn) for speed and memory consumption in singlebyte case.
Reviewed-by: alanb

Summary: Update the spec and code to accept '+' as a charset name character
Reviewed-by: alanb

6636317: Optimize UTF-8 coder for ASCII input
Summary: re-write the UTF-8 charset to obey the standard and improve the performance
Reviewed-by: alanb

Summary: Moved non-confidiential test cased from closed repo to open repo
Reviewed-by: martin