Build number

build_number -- Update the GridLAB-D build version information

/bin/bash$ build_number folder header

Remarks
The build_number script updates the header files used by core/version.c to identify the current version of GridLAB-D that is being built. The script executes the commands svn folder info and svn -q status folder to identify the version number and the source tree from which the build is compiled. This information is then embedded into the version string.