Update ignore file

The ignore file .gitignore have to be updated after add AMR regression tests (see #95 (closed)). Multibunch simulations generate some type of files that must be discarded as untracked files

created merge request !38 (merged) to address this issue

mentioned in merge request !38 (merged)

marked this issue as related to #95 (closed)

mentioned in commit 6d4b09c4

closed with merge request !38 (merged)