update syringe

- added syringe-irecovery
- removed injectpois0n, loadibec & tetheredboot
- created smaller limera1n- & steaks4uce-payloads by moving the function
offset finder into syringe
- added a BootROM-dumper
- added winocm's "monstrosity" crash on A5 - A6X
- made it Windows & MSVC-only
- removed CURL & ZLIB
- removed greenpois0n payloads
- removed all references to pwnage2 as it wasn't implemented
- moved steaks4uce's exploit-payload to steaks4uce.h
- dynamically determine the payload sizes
- added newer devices
- fixed up double handles in "irecv_client"
- silenced warnings about killing iTunes
- merged a few commits of
http://github.com/libimobiledevice/libirecovery
- renamed vars and functions, which names equal to types