MR to allow target export of the CPP driver (allows another project to build as part of their build, which is a primary usecase for the scylla driver). Additionally, adds install export function which allows other code to more easily import the cpp driver once it's installed.
closes #52
MR to allow target export of the CPP driver (allows another project to build as part of their build, which is a primary usecase for the scylla driver). Additionally, adds install export function which allows other code to more easily import the cpp driver once it's installed.