Some methods are installed as custome in a specific repo

A custom method installed in the custom repo : /opt/PV-XXX/prog/curdir/user/ParaVision/methods/src/

Curent repo : /opt/PV-XXX/prog/parx/src/

To fix this in installMethod.py

• Add a way to test if the meth exists in the standard repo.
  • If no tests the custom repo
• Add a new optional param to aim at any path