read P3 file
Revert "read P3 file"

This reverts commit 84f4037b64f1e207c8c988a9141b5d535b670884.
Revert "Revert "read P3 file""

This reverts commit c026d55e2d46aef2d0cc96a7c3f388b332912f92.
changed gitignore