[PTFM-5906] Some Major changes to CMakeLists.txt & Makefiles (for C++ stuff)
  - Updated dx-app-wizard templates
  - Updated CMakeLists.txt for dxcpp/dxjson/dxhttp
  - Updated cmake files for contigset2fasta, wig-to-wiggle, etc
  - Updated dxcpp tests
  - various other changes
Merge pull request #11 from dnanexus/PTFM-5906-cmake-fixes

[PTFM-5906] Major cmake changes for all C++ programs in dx-toolkit