translating the multiple intances hint in instalation
fixing ~ relative path to be coherent when talking about include_path
going back to ~, will move that to another pull request
Revert "going back to ~, will move that to another pull request"

This reverts commit b296293cd205ce094af539dc52c62bcec02299ea.
Merge pull request #741 from steinkel/feature/installation-es

Small contribution for a great project