Please add build hash to version

[PaulMcMillan]

It would be extremely helpful to have some way of identifying the different masscan binaries. The most obvious would be to have the makefile try to inject the git hash of the current commit into the output of -v.

[robertdavidgraham]

I don't know how to do this. I'm really a git nub, and have no clue how this whole thing works.

[robertdavidgraham]

C:\dev\masscan>bin\masscan --version

Masscan version 1.0.3 ( https://github.com/robertdavidgraham/masscan )
Compiled on: Jan 31 2014 19:11:18
Compiler: gcc 4.4.0
OS: Windows
CPU: x86 (32 bits)
GIT version: 1.0.1-64-g0d779d0

[PaulMcMillan]

awesome!