semi-ɑ 0.1.5.1

Implemented accelerometer
Reduced console.log's that are called without logging activated
Implemented feature to use accelerometer (may change)
Added native string functions contains, replaceAll, and replaceSelf
(replaceSelf throws an error, so don't use it)
Added an extremely useful function isset
Replaced an if/else statement with a ternary operator, and commented on
it
removed max-width constraint on the menu
worked on fixing an error in the emulator function (traced it to
blocks.js)
Fixed an error in blocks.js
Added gyro.js (unimplemented) for future gyroscope implementation
Removed showcase/wiki.css because it was useless