Merge pull request #38 from snuk182/bugfix-choice-font

Fix #37

added support for interpolation in goto and jump

fixed bug with listbox

Also might fix the font undefined issue on the switch

fix non-determinstic font bug, audio loading issue, and linear scaling

minor function move

added some future work for auto version bump

use filetype of file to decode which extension to use

save files now track audio

fix bugs with text, bgimage, and saving

text no longer fails for empty strings
bgimage now checks if the path exists
saving now saves the last instruction

workaround for issue with text and choice

might look kinda weird but it is better than missing text