Commit 4e356a92dc6ee443b6a40e50992afbdbf86fbb2f

DRC 2016-01-13T12:25:03

BUILDING.md: Restore autotools processing instr. Partially reverts 54014d9c2a41905b7b766057af6728834da64b59. When building from a git sandbox, as opposed to from an official source tarball, it is still necessary to run autoreconf. Closes #48