Update Readme - Building and Testing from Source
Update Readme - Building and Testing from Source

adding Building and Testing from Source section
shajyhia/score-language,narry/cloud-slang,CloudSlang/cloud-slang,CloudSlang/cloud-slang,natabeck/cloud-slang,natabeck/cloud-slang,shajyhia/score-language,jrosadohp/cloud-slang,CloudSlang/cloud-slang,CloudSlang/cloud-slang,jrosadohp/cloud-slang,narry/cloud-slang