Enable C++ language track publicly
Move most of SETUP.md to getting started with C++ page
nucleotide-count: Remove special treatment of uracil

For the related discussion see https://github.com/exercism/xpython/pull/98.
Merge pull request #10 from sjakobi/adjust-nucleotide-count

nucleotide-count: Remove special treatment of uracil
Merge pull request #11 from LegalizeAdulthood/go-live

Go live
Initially, only the first test is enabled.
Pass difference-of-squares
Pass roman-numerals
Add CMake recipe
Merge branch 'roman-numerals' of github.com:LegalizeAdulthood/exercism-xcpp into roman-numerals