Test Assertions: 7.5; 7.6; 7.7; 12.1
Code refactoring + pan-x pan-y symmetry test
SVG test + code refactoring
Updated test assertion number
Merge branch 'tests' of https://github.com/ArtemAntonets/web-platform-tests-msft into ArtemAntonets-tests
Processed comments for constructor, pointerout_after_pointercancel,
pointerout_after_pointerup, pointerout_pen and also indentation fix
Change pointerdown to pointercancel, increase timeout for svg.
Merge branch 'tests' of https://github.com/ArtemAntonets/web-platform-tests-msft into ArtemAntonets-tests
Fix some grammer in a couple tests, drop SVG & t-a symmetry tests
Merge branch 'ArtemAntonets-tests' into submission/Microsoft/PointerEvents
Merge branch 'master' into submission/Microsoft/PointerEvents
Address WG feedback from #1074
Merge pull request #1074 from InternetExplorer/submission/Microsoft/PointerEvents

Test assertions 12.1, 7.5, 7.6, 7.7 submissions