Fix problem with exported cmake configuration (was ACTS-94)

Original author Christian Gumpert @cgumpert

The escaping of public compiler options in ACTSTargets.cmake is handled differently between different versions of cmake.

ACTSConfig.cmake contains an obsolete and empty ACTS_VERSION cmake variable.

Edited Mar 27, 2019 by Moritz Kiehn

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information