* cmake: Specify headers for the sla and decomp libraries
* example: Create `sleigh-lift` program
* Move `sleigh-lift` under tools and make it part of the same CMake project
* Turn on more stringent warnings
* Consolidate on types
* Only apply stringent compiler warnings for debug builds
* Add missing cassert include
* Rename `ParseBytes` => `ParseHexBytes`
* Fix types
* Add license header to `sleigh-lift`
* Add section to README introducing `sleigh-lift`
* Reword README
* Add `libsleigh.hh` which includes all SLEIGH headers and applies
appropriate pragmas to silence warnings
* Change `find_package` test to use the `libsleigh.hh` header
* Fix `libsleigh` header to check install directory
* Older version of Clang don't have `-Wdeprecated-copy` as a separate
warning to `-Wdeprecated`
Alex Cameron