Normalize data before sending to classifier

Add max and min of x & y to `struct drawing`

Formatting

Use `XC_watch` cursor while waiting for server

Disable drawing print when pressing `<Return>`

Add 'detexify.kirelabs.org' classifier

Add short description of usage and shortcuts

Print points only when pressing Return

Allow single-line if statements

Create `reset_drawing` to clear the point arrays

Move bits into `init_drawing()`

Print only necessary newlines in `print_drawing`

Rename `INIT_NUM_POINTS` to `INIT_SHAPE_SIZE`

Store all points instead of only printing them

Break on press of return