Fixed crash when collecting items on ViewBox and fixed exception which could happen when dragging when mouse handling is disabled.
Minor cleanups for GraphItem
Minor edits
Merge branch 'fabioz-crash' into develop
Changed FiniteCache which had a bug where calling items() would make it recurse forever with a new LRUCache implementation.
Correct to unix line endings
Style corrections
Moved lru_cache to util, test to util/tests
Correct GraphicsItem to use relative import of lru_cache
Update MultiPlotSpeedTest to test lru_cache performance
Merge branch 'fix_finite_cache' into develop
Added instructions for contributing to pg
corrected contributors list
AxisItem.setPen: make sure that default pen is not NoPen