In case of MPI calculations, ELPA does _not_ anymore rely on the user
to check that his provided BLACSGRID setup is reasonable.
Now ELPA does check this (again) during ELPA_SETUP and returns with
an error if this check fails

Change buffer size for the pure blocked configuration

See merge request !68

in pure blocked config the buffer size should be slightly increased to accomodate message sizes

Correct the path to the USERS_GUIDE.md

See merge request !67

USERS_GUIDE.md is now under ./documentation

modify max_stored_rows

See merge request !66

expand the intervals between the levels to prevent the optimization algorithm from picking a value that bears insignificant improvement compared to one lower factor

Default is now 256. Also, the autotune levels were adjusted to more suitable values.

ELPA can compile on Fugaku

See merge request !65

ELPA can compile on Fugaku

See merge request !64

New keywords for GPU in ELPA index

See merge request !63