Update README.md
Fix boost.mpi linux build bug
Merge branch 'develop' of https://github.com/ruslo/hunter into develop
Allow HUNTER_BASE customization
Allow custom HUNTER_PACKAGE_DOWNLOAD_DIR location
New testing script
Emulate HunterGate
Merge branch 'develop' into sugar
Convert HUNTER_BASE to cmake-style path
Merge branch 'develop' into sugar
Convert HUNTER_PACKAGE_DOWNLOAD_DIR to cmake-style path
Merge branch 'develop' into sugar