Add contributions section to README
Add contributions section to README

emodeqidao/sqlcipher,hongbinz/sqlcipher,ylfonline/sqlcipher,RAN-II/sqlcipher,hongbinz/sqlcipher,pandazheng/sqlcipher,shanshan1026/sqlcipher,supriyantomaftuh/sqlcipher,pandazheng/sqlcipher,cnbin/sqlcipher,Mozhuowen/sqlcipher,Mozhuowen/sqlcipher,luis-allan/sqlcipher,shanshan1026/sqlcipher,RAN-II/sqlcipher,luis-allan/sqlcipher,RAN-II/sqlcipher,cnbin/sqlcipher,supriyantomaftuh/sqlcipher,ylfonline/sqlcipher,supriyantomaftuh/sqlcipher,cnbin/sqlcipher,Mozhuowen/sqlcipher,emodeqidao/sqlcipher,shanshan1026/sqlcipher,pandazheng/sqlcipher,emodeqidao/sqlcipher,hongbinz/sqlcipher,luis-allan/sqlcipher,shanshan1026/sqlcipher,ylfonline/sqlcipher