fixed PsiInvalidElementAccessException for invalid elements stored in PythonPathCache

clear PythonPathCache on pushLanguageLevel
fixed PY-14538 BUG: Invalid IPython Notebook generated by PyCharm 4.0
fixed PY-6518 Editing name of Python interpreter doesn't repaint "Python Interpreters" dialog
Merge remote-tracking branch 'origin/master'
fixed move cell up location in keymap
NPE fixed
IDEA-133479 Regression: Impossible to have local and shared inspection profiles with the same name
support tabbed content if "Show Views as Tabs" == false
make modules included in artifact when 'build artifact before run' task is performed (IDEA-132397)
removed wrong local imports from builtins

updated mock sdks
Merge remote-tracking branch 'origin/master'
method refs: use one thread local for all functional expressions
ensure console view will be disposed
IDEA-133338 Editor: visual defects on mouse over Analysis indicator (traffic light)
LocalQuickFix/IntentionAction javadoc: add note about *PriorityAction
Merge remote-tracking branch 'origin/master'
IDEA-106716 Don't steal focus (refactoring)
IDEA-133150 VersionControl tool window: with ShowViewsAsTabs==false and some History tab active tool window title looks confusing
IDEA-131616 Clicking inspection status square in scrollbar scrolls up one line at a time but shouldn't
replaced String literal "UTF-8" with charset instance