1. reassemble ParamConfig struct, put versionBuf tmpUriBuf and unparsed_uri three variables into ParamConfig. make lesser paramaters deliver between functions, and formatted variables scope.
2. fixed upstream return non 200 status stylecombine crash nginx worker issue.
3. fixed process big local file stylecombine(nginx version) never return issue.
4. add stylecombine(nginx version) never process local file size bigger than 2MiB logical construction.
5. make stylecombine(nginx verison) DEBUG function more completely.
6. renamed link operate function add() to linked_list_add(), make code more readable.
7. temporary fixed stylecombine(nginx version) output page's epilog has error words issue.
8. refactoring stylecombine core code to 2 new files. ( sc_core.c sc_core.h not tested yet. ^-^)
9. added stylecombine nginx version configure README.