Merge pull request #1 from Xarthisius/master

Update README
Added my preferred .setuprc
updated .gitignore
removed .setuprc from my master branch
Merge pull request #2 from gawrysz/master

updates to .gitignore
updated .gitignore

set up .gitattributes for selected files

[bin] set all scripts executable

[multigrid_gravity_helper] fixed messages

[multigrid_gravity] Removed local FFT solver as it is dead for too long

Removed prefer_rbgs_relaxation from various problem.par

[multigrid_gravity] removed prefer_rbgs_relaxation parameter

[multigrid_gravity] enabled FFT solver only on the base level

[multigrid_gravity] removed code obsoleted by c30e22dfcede8e0c09b69f251df4bad1b9a7a525

[multigrid_gravity] Improved sanity checks for FFT base level solver
Resolve conflicts