collect_betas() creates a dictionary with (mean,std) of CpG of samples
of the same sample type.
Methylation plots color CpGs by sample type :D
Querying the database without specifying a project name still creates a
{sample type: sample label} dictionary
Can query for all methylation samples and still plot them colored where
the hue associates with the sample type
Reorganized the way the methylation plots added each point to plot. It's
more efficient now! and uses the data dict structure
Merge branch 'master' of https://github.com/apfejes/epigenetics-software.git