Simple speed reader inspired by spreeder

TODO

new: set focus to the textarea
chunk size
font size
font color
font
background color
alignment
advances settings
- speed variability: slow down for larger chunks and speed up for smaller chunks so average wpm stays the same
- start new chunk at end of sentence and paragraphs
- slight pause at end of sentences and paragraphs
- skip over stopwords which convey no additional meaning to the sentence (i.e. 'the', 'an', etc)