CentOS 7 compilation

• 📓Compile OpenTimelineIO
• 📓OpenColorIO
• 📓PyString
• 📓ZLIB
• 📓Boost
• 📓OpenImageIO
• 📓libjep-turbo
• 📓libtiff
• 📓OpenExr
• 📓GCC
• 📓Openssl
• 📓CMake
• 📓CURL
• 📓GIT