Merge branch 'release-0.3' into development.
Merge branch 'hotfix-0.3.1' into development.
Update user manual to fix the name of the eyegrade.zip file.
Merge branch 'hotfix-0.3.2' into development.
Improvements to the user guide.

- Clearer explanation of the packages to install in Linux.

- Small formatting fix.
Merge branch 'hotfix-0.3.3' into development.
Remove a setup.py file that is obsolete and unnecesary.
Small change to the user manual.
Add a way of exporting custom grades listings.
Update translations to Galician and Spanish.

The translation to Catalan gets behind by now. I'll update it later.
Update changelog and version number to 0.4.
Merge branch 'release-0.4'.