[LOADER] Clean compile when loader is configured in, add BT_ExecImageFile() prototype.
[PROCESS] Added a BT_GetKernelProcessHandle() api.
[PROCESS] Added a BT_{Get|Set}ProcessFileDescriptor() allowing stealing or setting of process FDs. E.g. for enabling kernel mode logging.
[PROCESS] Added a BT_GetParentProcessHandle() api.
[LOADER] Inherit stdin/stdout from parent process when loading a user-mode executable image.
[SYSCALL] Correctly compile syscall objects when adding syscall support.
[SHELL] exec - Added an exec command to do simple loading of elf userspace binaries.
[LOADER] Close image file and free memory after loading executable.
[SYSCALL] Implemented the initial system calls.