This is a major revision:

  - added interface files (.lusi) in the language, that can be compiled on their own, giving an object file (.lusic) and a header file (.h)
  - modular code generation, from Lustre to C level included.
  - nice amount of code refactoring



git-svn-id: https://cavale.enseeiht.fr/svn/lustrec/lustre_compiler/trunk@326 041b043f-8d7c-46b2-b46e-ef0dd855326e