improved comments
improve comments
don't need dataframes

dataframes was in the file since I copied it from HDF5
Uncertain no longer subtype of FloatingPoint

It makes everything simpler
support for Quantity{Uncertain} without Uncertain <: Number
more concise superscript
with working, but incorrect dynamic precision printing

Because of the way sprtinf is implemented, you need this @eval trick to
do dynamic precision printing.
added another comment about string formatting
better printing of Uncertain
added a comment
move things around, started adding cgs
added BaseUnit and DerivedUnit, and support for prefixed base units

Why would anybody have a prefixed base unit? Horrible idea, but we're
stuck with it.
added comment documentation to what_to_load.jl
removed test of changing base units

since I added prefixes to base units, it doesn't work the same way,
although I'm sure you could make it work
redid changing of base units, it works with prefixed base units now
added some test for prefixes with prefixed base units
updated docs
updated docs
updated docs
updated docs