docs: fix term name
fix paths for installation
setup.py: fix list of scripts
fix output of generate_thumbnails()
tweak custom view for vibro_acoustic3d.py example in script/gen_gallery.py
2013.3: update release notes
2013.3: update news
2013.3: bump version number
rename sfepy/mechanics/contact_planes.py -> sfepy/mechanics/contact_bodies.py
new sfepy/linalg/check_derivatives.py - new check_fx()
use max-norm in check_fx()
new check_vfvx()
new ContactSphere
fix empty array condition in ContactPlaneTerm.smooth_f()
new ContactPlaneTerm._get_force_pars(), update .get_fargs()
new ContactSphereTerm (dw_contact_sphere)
new examples/linear_elasticity/elastic_contact_sphere.py + test
update HypermeshAsciiMeshIO reader: support for quad4 and tri3 cells
update mesh reading/writing: print infromation about supported cell types