update get_tensor_product_conn() for non-array shape
remove unused Variable.get_full_state()
update ConstantFunctionByRegion.get_constants() to use Region.get_cells()
rename sfepy/fem/ -> sfepy/discrete/fem/
move general files from sfepy/discrete/fem/ to sfepy/discrete/
update setup.py files for new paths
split fem/dof_info.py -> common/dof_info.py, fem/lcbc_operators.py
update sfepy/discrete/__init__.py, sfepy/discrete/fem/__init__.py
update sfepy/ for new paths
update top level scripts for new paths
update examples for new paths
update tests for new paths
update scripts for new paths
update docs for new paths

- sync module index of developer guide with current sources
update docstrings for new paths
update MANIFEST.in for new paths
fix docstring formatting
remove .hgignore
remove sfepy/mesh/femlab.py, sfepy/mesh/meshutils.py
remove friction_slip.py, sfepy/mechanics/friction.py