fix #1878
Fix previous commit memleak and handle <=N bwdisasm
Implement 'ko' and 'kd' to open/dump Sdbs, Helpers for PE ordinal symbols
Better relocs in disasm and support reloc resolution by ordinal on PE

- Include OLEAUT32 and WS2_32 ordinal-symbol tables
Add pdb usage markdown
Enforce sandbox for ko/kd
Build DLL sdb ordinal-symbol databases
Fix reloc ordinal resolution issue
Avoid doing searchs when searching (thanks maijin)
Disable self:// in sandbox mode
Add more cached dll ordinals
Fix /E 1 crash
Add missing header defintions for r_io_wundo_apply|_all
Fix shm crash and update sdb
fix search crash on non opened file

r2 --
/ blah
[segfaultz]
Add and handle `graph.from` and `graph.to` (Useful for `ag`)
Add `user-install` and `user-uninstall` make targets

- Add sys/user.sh to install r2 at home
Silent oom killer with a size check before malloc
Add experimental agf to compare two functions from the same file #1894