create 5.1 branch
added more windows support, added compatibility for VS 2010
moving all external dependencies to install folder
moving external dependencies to install folder
corrected version number
added more windows support, added compatibility for VS 2010
added additional files for release
updated PACKAGE_VERSION
corrected path to external dependencies
corrected path to external dependencies
fixes for occ doctor on windows
added M_PI
attach surface elements to vol elements
 dropsexport bug fix