Include global.pri in top-level openrpt.pro
Use system dmtx library if USE_SYSTEM_DMTX environment variable set
Build shared libraries if BUILD_SHARED_LIBS is set
Use the name libopenrptcommon for the dll version of libcommon
Merge branch 'master' into package-building-options

Conflicts:
	MetaSQL/importmql_gui/importmql_gui.pro
	MetaSQL/metasql_gui/metasql_gui.pro
	OpenRPT/bldtbls/bldtbls.pro
	OpenRPT/export/export.pro
	OpenRPT/import/import.pro
	OpenRPT/import_gui/import_gui.pro
	OpenRPT/renderapp/renderapp.pro
	OpenRPT/renderer/renderer.pro
	OpenRPT/writer/writer.pro
	OpenRPT/wrtembed/wrtembed.pro
Use the name libopenrptcommon for the dll version of libcommon (fix for import_gui)
Merge pull request #20 from dpocock/package-building-options

Package building options. Build on Mac fails with these changes but I've opened https://github.com/xtuple/openrpt/pull/26 to fix those problems.