Project code modularize #5
Description
Current project consists of many smaller modules such as "fmidx", "histo", "lchash", "mlog", "ssw". "mlog" has already been moved out of the project as a git submodule for this project. The other modules should also be moved out because it's becoming harder to test and debug individual modules. The modules are closely coupled with each other in the project which makes it a big problem when debugging and updating. Meanwhile, the dependency relationship between some modules is not clear such as the relationship among "lchash", "fmidx" and the project "accseq".