Very partial implementation of the recomposer.
Merge branch 'master' of https://github.com/aghosn/persistence
Separated file for Node class used in AST Compress

Since we use our own structure of AST for the compression,
once this one simplified by storing separately the names,
symbols, types.
This will allow us to program the ASTCompressor in an external
class.
Merge branch 'master' of https://github.com/aghosn/persistence
Cleaning of comments.