separate MultiProg compiler from itself

  1. eCLR.dll is compiled as managed CPP with lots of unsafe compiler option.
  2. the program is generated under project folder with .exe extension.
  3. eCLR.dll start process /eCLR/CIL-Compiler to compile from project to binary using method named LinkImage. (with uncertainty)
  4. Execute /eCLR/CIL-Compiler/____.exe ___/res/___.exe would generate ___.img.