Winix 2.6

• Add more unit tests
• Run unit test at the start of the init
• Fix minor bug of inode number of pipe
• Add more error checking in file system
• Implement zone iterator to loop through direct and indirect zone
• Reduce file system block size to 256KB
• Fix bug in bash parser
• Split system call definition into POSIX specified header rather than syscall.h
• Use gcc as header processor to leverage attribute extensions for linting
• Add attribute ((format (printf, ))) for lint checking
• Add linker