Starting the feature hidefile.
First approach to hide files.
Most of the code needed to hide files.

Hooks in syscallhooks

A few changes needed for this feature.
Adding logic for sys_getdents64. UNCOMPLETED.
Almost finished hidefile feature. Also added a bit of logic to hide
/proc/<pid> files (a hideproc feature), but it still doesn't work.
Almost finished hideproc and hidefile... a few more tests needed, a bit of
cleanup and it's done.
Finished a first approach to hide files. Also fixed lots of bugs, specially
process hide related and a few more.