Compile with -g, so that valgrind can show line numbers

operation_priority.f95 shows the difference between user defined
operations and default operations

.gitignore to ignore binary files -> mv txt files to *.txt

-std=f95 → Fortran 95 standard: no tab allowed
-fmax-errors=3 → show only the first 3 errors, usely first error leads
to alot more cryptic errors