bart: version 0.7.00

["Uecker, Martin" <Martin.Uecker@med.uni-goettingen.de>]

Hi Andreas,

I pushed changes for a the version of bart. Maybe you could
take a look?  There are some failures in the CI on salsa.

The i386 build triggers a compiler crash. I will try to
look into this later (I am a GCC contributor myself), but
this is a compiler problem.

The other failures may be related to the build environment
not being up-to-date.

Martin