* fix#1087. the CFRunLoopTimer was never started if the user never changed the controlflow.
* RedrawRequested ordering matches the new redraw api
consistent asserts
lots of appstate refactoring to rely less on unsafe, and hopefully make it easier to maintain
* ios: dpi bugfix. inputs to setContentScaleFactor are not to be trusted as iOS uses 0.0 as a sentinel value for "default device dpi".
the fix is to always go through the getter.
* move touch handling onto uiview
* update changelog
* rustfmt weirdness
* fix use option around nullable function pointers in ffi
* Document why gl and metal views don't use setNeedsDisplay
* change main events cleared observer priority to 0 instead of magic number
log when processing non-redraw events when we expect to only be processing redraw events
* iOS os version checking
* iOS, fix some incorrect msg_send return types
* address nits, and fix OS version check for unsupported os versions
* source for 60fps guarantee
* Format everything and add rustfmt to travis
* Remove extern crate winit from examples and add force_multiline_blocks
* Format the code properly
* Fix inconsistent period in PULL_REQUEST_TEMPLATE.md
* Only run rustfmt on nightly
* Travis fixings
* port ios winit el2.0 implementation to the new rust-windowing repo
* unimplemented! => unreachable
trailing comma in CFRunLoopTimerCallback
* implement get_fullscreen
* add iOS specific platform documentation. Add a TODO about how to possibly extend the iOS backend to work have methods callable from more than just the main thread
* assert that window is only dropped from the main thread
* assert_main_thread called from fewer places
