Début de travail sur stratégies
add fixes for pretty (a pretty pretty printer)
Started adding the new keywords and directives
Merge branch 'master' of https://github.com/ptal/nominal-workbench
delete local test file from ocp
Merge branch 'master' of https://github.com/ptal/nominal-workbench
Merge branch 'master' of github.com:ptal/nominal-workbench into hashcons