add some additional columns
scatterplot uncertainty  = f(DHf_298K)

SVG
use a better way of parsing the pieces of content of hf298_1

using map function
add axis labels for x/y axis of scatterplot
move sort code to dedicated js file: sortTable.js
replace table tag by generic div with class attribute
Merge branch 'scatterplot'

Conflicts:[resolved]
	index.html
incorporate scatterplot in main.js
move table creation into its own file: js/createTable.js
chain some parsing functions in get_uncertainty(species)
add circle text labels on hover using CSS selector
add CAS no. in text label of data point
create mw scatter plot

both axis show mw, so it could be improved.
use binned-bar chart instead of scatterplot for MW
added removed closing head and starting body tag
use d3.histogram to plot MW rather than my own bar plot
add bubble chart with composition info of molecules in Burcat db

exclude C, H
use hard-coded JSON data file
remove scatter div and replace by svg for uniformity

also center svg elements
add subtitle with reference to database
add subtitles per section