initial work on word positioning and pdf spacing problem

[tdclemens]

This is a super rushed solution for grouping words into spans and solving the spacing problem.

To group characters on a line into words:

• It gathers the the letter state of each character on a line (its position, length, etc)
• While the characters are being outputed on a line:
• * it groups characters into words based on spacing (words are enclosed in spans)
• * tries to detect when a space is supposed to be present and creates a new word
• * calculates the position of a word when it is created.

What it does well:

• positioning the words at the beginning of where the word is displayed in the pdf
• displaying the words correctly even when the spacing problem is wrongly solved

What it does bad:

• detecting spaces due to positions in pdf
• detecting spaces due to positions in pdf when a line has multiple states
• aligning the end of a word in html with the end of the word in the pdf.

I have a similar solution in mind that will most likely work better. I will right up an issue for it next.