Migrated from PyDev to PyCharm IDE
Fixed append_text() method to conform unit tests
Refactored test files
Added tag_attribute_equals() method to HTMLTreeNode
Created HTMLTreeBrowser class for HTML tree utility methods
Implemented has_mutual_parent() method in HTMLTreeBrowser
Implemented get_grouped_text_length() method in HTMLTreeBrowser
Reimplemented BlogRecognizer using new set of methods
Implemented reading settings from configuration file
Removed IDE dependent files
Merge branch 'wedt-refactoring'