Temp hunterised v3.0.2

Official v3.0.2 release plus hunter changes from our v2.3.0 version

Hunterised v2.3.0

Official v2.3.0 plus hunterisation changes from v2.2.1

Hunterised v2.2.1

Official v2.2.1 plus hunterisation changes from v2.1.0

Hunterised v2.1.0

Official v2.1.0 with hunterising extras from v2.0.0 equivalent.

Hunterised version of v2.0.0

Official v2.0.0 with cherry-picked hunter-related changes from last release, excepting the
install locations set up manually as upstream has been restructured.

Modified v1.2.0

Upstream v1.2.0 with minor mods to allow use in hunter, plus update to package
configuration so won't attempt to create duplicate ZXing::Core targets even if
called multiple times on cmake via find_package()

v1.2.0

v1.2.0 upstream with minimal cmake changes for use in hunter environment

Build static libraries for all platforms

Merge pull request #1 from idscan/always-build-static-library

Always build static library

ab_test_zxing2

Setting up the install locations

ab_test_zxing

Alway build static library