fix unsigned integer overflow 0 - 1
fix type of code_point; add check code_point is in the valid range
Merge pull request #50 from Maxime2/utf8

fix type of code_point; add check code_point is in the valid range
Merge pull request #49 from Maxime2/parser

fix unsigned integer overflows 0 - 1
Update README.md
Merge pull request #52 from BipSync/master

Update README.md