update IGField.get_econn() for surface connectivities
simplify IGField.get_dofs_in_region_group() by using .get_econn()
new get_facet_axes()
new solve() convenience wrapper
new create_boundary_qp()
new get_surface_degrees()
update IGField.set_dofs() for DOFs given by function, update docstring

- initial implementation
update examples/linear_elasticity/linear_elastic_iga.py for EBCs by function
update custom view for linear_elastic_iga.py example in script/gen_gallery.py
script/gen_iga_patch.py: plot 1D basis along patch mid-line
fix setup.py - add missing plot_logs.py script
fix path to links.inc
remove unused sfepy/physics/energy.py
docs: sync module index of developer guide with current sources
update AUTHORS
docs: add introductory paragraph to examples
2014.3: update release notes
2014.3: update news
2014.3: bump version number
script/gen_iga_patch.py: report number of DOFs per axis