Random changes responding to #11230 and other issues
Add exercise: Free throw probability
Reflecting changes in main site (for menu dropdowns). Stripping out
some css IDs and converting others to classes.
Merge branch 'master' of http://github.com/Khan/khan-exercises
Fewer players; css bug
fix #20088 fix #20083 fix #20080 fix #20067 fix #20055 fix #20038 fix #20022 fix #20021 fix #20004 fix #20001 fix #19991 fix #19990 fix #19977 fix #19972 fix #19944 fix #19929 fix #19923 fix #19917 fix #19915 fix #19860 fix #19854 fix #19850 fix #19842 fix #19838 fix #19835 fix #19833 fix #19825 fix #19822 fix #19811 fix #19803 fix #19743 fix #19715 fix #19714 fix #19713 fix #19712 fix #19711 fix #19709 fix #19703 fix #19698 fix #19695 fix #19682 fix #19679 fix #19666 fix #19657 fix #19655 fix #19652 fix #19646 fix #19627 fix #19580 fix #19576 fix #19575 fix #19573 fix #19560 fix #19549 fix #19523 fix #19513 fix #19511 fix #19509 fix #19431 fix #19429 fix #11899 fix #10418
fix #20116; fix #20081; fix #19946; fix #19853; fix #19852; fix #19851; fix #19849; fix #19848; fix #19847; fix #19846; fix #19845; fix #19844
These are actually coplanar...
Merge branch 'time' of https://github.com/Christi/khan-exercises

Conflicts:
	exercises/telling_time_2.html
fix #11230; fix #11347; fix #11388; fix #11396; fix #11399; fix #11427; fix #11439; fix #11450; fix #11471; fix #11487; fix #11491; fix #11493; fix #11517; fix #11532; fix #11542; fix #11572; fix #11591; fix #11614; fix #11632; fix #11750; fix #11782; fix #11798; fix #11841; fix #11854; fix #11855; fix #11917; fix #11944; fix #11961; fix #11965; fix #11988; fix #11999; fix #12012; fix #12050; fix #12063; fix #12067; fix #12078; fix #12124; fix #12126; fix #12127; fix #12171; fix #12189; fix #12216; fix #12219; fix #12280; fix #12284; fix #12366; fix #12379; fix #12421; fix #12444; fix #12453; fix #12460; fix #12461; fix #12484; fix #12488; fix #12491; fix #12543; fix #12544; fix #12592; fix #12694; fix #12826; fix #12840; fix #12842; fix #12852; fix #12902; fix #12916; fix #13024; fix #13056; fix #13071; fix #13074; fix #13097; fix #13102; fix #13135; fix #13150; fix #13263; fix #13315; fix #13344; fix #13380; fix #13387; fix #13391; fix #13411; fix #13499; fix #13500; fix #13537; fix #13585; fix #13589; fix #13892; fix #13912; fix #13991; fix #13993; fix #14047; fix #14055; fix #14084; fix #14086; fix #14122; fix #14126; fix #14259; fix #14361; fix #14483; fix #14494; fix #14508; fix #14581; fix #14599; fix #14615; fix #14618; fix #14641; fix #14710; fix #14853; fix #15678; fix #15753; fix #15811; fix #15990; fix #16023; fix #16097; fix #16129; fix #16130; fix #16181; fix #16189; fix #16196; fix #16219; fix #16315; fix #16327; fix #16383; fix #16454; fix #16519; fix #16534; fix #16672; fix #16696; fix #16846; fix #16892; fix #16907; fix #16956; fix #16985; fix #17093; fix #17239; fix #17406; fix #17445; fix #17464; fix #17469; fix #17479; fix #17548; fix #17688; fix #17932; fix #17958; fix #17998; fix #18057; fix #18081; fix #18087; fix #18100; fix #18102; fix #18108; fix #18117; fix #18121; fix #18131; fix #18151; fix #18170; fix #18179; fix #18182; fix #18230; fix #18277; fix #18278; fix #18332; fix #18340; fix #18344; fix #18345; fix #18387; fix #18458; fix #18459; fix #19530; fix #19535; fix #19539; fix #19550; fix #19599; fix #19633; fix #19645; fix #19662; fix #19755; fix #19756; fix #19778; fix #19782; fix #19814; fix #19818; fix #19834; fix #19886; fix #19890; fix #19893; fix #19997; fix #20031; fix #20033; fix #20035; fix #20107; fix #20167; fix #20196; fix #20268; fix #20288
Fix telling_time_2 validator for case where hour and minute hand are in the same place

fix #20312
minor change to hints (fixes multiple issues)
minor change to hints (fixes multiple issues)
Merge pull request #20566
make hint button descriptions a little clearer
address @spicyj 's review comments: indentation and proper pluralization
Rename free_throw to independent_probability
Merge branch 'lebron' of ../../eater/khan-exercises
Disable scratchpad so users aren't drawing on the scrollbar

fix #21018; fix #21013; fix #20994; fix #20993; fix #20984; fix #20982; fix #20981
create() calls activate(), so activate() should be defined before the call to create() is queued