Refactored get-build-file-relative-location in myantcompile.el, in order
to make possible to specify regexps for the build file to be found.
Add an option to get-build-file-relative-location to include the filename
of the build file found inside the path returned (previous commit).
Add functionality to call vcbuild compile process without compilation
buffer of Emacs in myantcompile.el (Emacs).