Updated intro

Made some changes to the intro section of the text.
Date/time to index, reorganize intro

I added a date/time line to the index page, so people would be able to
tell when the document was last updated. In addition, I realized that
the ordering of the intro section was messed up, so I move things around
and added a new section heading.
Modified Examples intro page
Made a draft of the FTIR section

I made a quick draft of the FTIR section of the documentation.
Added paragraph to Examples, fixed ftir plot

Added a paragraph to the Examples page about publication quality plots.
Added some comments to the publication quality plot.
Added a UV/Vis plot

Realized that I could use a section on plotting UV/Vis data as an
stepping stone to the NMR section.
Updated NMR plotting

Made an updated version of the NMR plotting section. Added a data set
and a publication ready example as well.
A small fix to final NMR plot

Removed y ticks and top ticks from the final NMR plot
Made two pub qual NMR plots

Decided that the NMR plots were too complicated. Made a second one that
was not as fancy. Now there are two publication quality plots.
Made a draft batch processing section

I'm using Lucy's UV/Vis data from APS, because it can be overlaid as
well.