Add HT1621B source files, the document will be sent later.
Add 93LC46A source files, the document will be sent later.
Merge branch 'master' of https://github.com/coocox/cox
whole files for HT1621B Driver
whole files for 93LC46A EEPROM Driver
Led RGB Driver
Merge remote-tracking branch 'remotes/zc/master'
add doxygen doc of ht1621b led and 93lc46a