Added --with-spir configure flag to control Clang/SPIR location.
Fixed bug with configure adding duplicate -lclang flag.
clc.h now embedded in library.
Fixed build system to pass 'make distcheck'.
Added up-to-date build and usage instructions to README.
Space for instruction result only allocated if necessary.
Debug values only stored if in interactive mode.
Renamed oclgrind to Oclgrind.