Initial Release

Features:

• handling non-return gadgets (jmp reg, call reg)
• set registers (rdi=0xxxxxx, rsi=0xxxxxx)
• set register to register (rdi=rax)
• write to mem
• write string/bytes to mem
• function call (open('/etc/passwd',0))
• pass register in function call (read('rax', bss, 0x100))
• avoiding badchars
• stack pivoting (Exrop.stack_pivot)
• syscall (Exrop.syscall)