speed up eval_mapping_data_in_qp()
normalize paths in top_dir, data_dir and base_dir
update import_file() to use full package paths for sfepy modules

- prevents name clashes for different fields.py files
add can_reload argument to import_file()
do not force module reload in load_classes()
Merge pull request #268 from vlukes/i263
fix Newton.__init__(), Oseen.__init__() to obey log plot option
relax too strict assertion in DensityVolumeInfo.__call__()
speed up eval_variable_in_qp()
speed up eval_in_tp_coors()
Merge branch 'iga-c-2'
do not force examples to be in a package

update import_file(), ProblemConf.from_file()
new sfepy/discrete/iga/domain_generators.py - new gen_patch_block_domain()
script/gen_iga_patch.py: use gen_patch_block_domain()
return NurbsPatch instance from gen_patch_block_domain()
clean up sfepy/discrete/conditions.py
docs: sync module index of developer guide with current sources
fix docs generation without igakit
fix typeset_term_table() for import_file() using full package paths
docs: add missing figure