Update to Precision files

-Still a few problems with UFloat
--UFloat::sci_note()
--UFloat::operator+=()

-Major optimizations are still being researched

-Template Generalization INT_BASE_ incomplete
--Instantiation of default types breaks Fract class
---Goes into infinite loop when calling Fract::Fract(Str)

-INT_BASE_ specializations not yet written
--Base 10 '0' to '9'
--Base 2 0 to 1