Add autoconf scripts instead of Makefile
Create autotools for easier compiling
Correct the instructions for compilation

We don't have Makefile anymore
Correct the instructions for compilation
Ignore m4 cache files, update instructions
Merge branch 'c_autotools' into c

Conflicts:
	README.md
Resolved conflicts!
Merge branch 'master' into c

Let's use all these autotools by default.