[mcpat] Added contrib/mcpat/mcpat.h header file for including within Graphite
[mcpat] Added contrib/mcpat/mcpat.h header file for including within Graphite

mit-carbon/Graphite,nkawahara/Graphite,mit-carbon/Graphite,8l/Graphite,victorisildur/Graphite,mit-carbon/Graphite,victorisildur/Graphite,8l/Graphite,nkawahara/Graphite,victorisildur/Graphite,8l/Graphite,fhijaz/Graphite,fhijaz/Graphite,mit-carbon/Graphite,nkawahara/Graphite,fhijaz/Graphite,victorisildur/Graphite,nkawahara/Graphite,8l/Graphite,fhijaz/Graphite