Imported Upstream version 0.8.3
Merge tag 'upstream/0.8.3'

Upstream version 0.8.3
 d/changelog: new upstream version 0.8.3, upload to unstable
 d/rules: do not compress example sessions and external model functions
 force 644 permissions for the files in the examples dir
 d/control: move python-sympy to recommends
Merge branch 'debian-master'