Proposed fix to the decode regexes to cover missing characters, and exclude illegal sequences.
[Bug 3601995]: Accepted [decode] changes by <quantifier@users.sourceforge.net>.
Fixed both missing acceptance of various ut-8 sequences, and missing
rejection of bad sequences. Test cases added. Bumped to version 1.4.1.
Merged ncgi fixes (bug 3601995 branch) into release. Updated README.