Adds simple fraction rules.
Merge branch 'master' into fraction-rules
Merge branch 'master' into fraction-rules
Adapted more characters and test.
Adjusted some capitalisation.
Adjusted some capitalisation.
Added fix for simple fonts.
Adds better semantic handling of numbers, fractions and fonts.
Treatment of vulgar fractions.
Added some temporary files.
Adds mixed number handling.
Adds tests for mixed fractions.
Treatment of minus in mathspeak.
Cleanup some code.
Further code cleanup.