Merge CV, ver=5.1; ops/methods from HV, and interface from CV where possible
- [DH] cinelerra-5.1/build/Makefile.cinelerra
- [DH] cinelerra-5.1/build/README
- [DH] cinelerra-5.1/build/bld_dynamic.sh
- [DH] cinelerra-5.1/build/bld_incremental.sh
- [DH] cinelerra-5.1/build/bld_package.sh
- [DH] cinelerra-5.1/build/bld_prepare.sh
- [DH] cinelerra-5.1/build/bld_static.sh