add md5 functions
Add rc4 function
add const flag on src params
change comment for pcs_cat function
add function pcs_http_rawdata
add function pcs_req_rawdata
add comments for pcs_req_rawdata
modify the pcs_cat: the function return the raw data which is come from server
add --rc4 option.
implemente that: encode (rc4) the content when cat|echo with --rc4 option
change makefile for linux and cygwin
change project files for vs2012