* Fix bug in fxtransform
* Add some more tics on the color legend for heatmap.fx
* Update .gitignore
Add analysis1.Rmd, which provides some analysis of the first two runs.
Update the color scale for fx values so that we can see the difference
between small positive and negative values.
Add commentary on delta-x plot.
Add general heatmap function.  If it survives testing, it can replace
the (rapidly proliferating) variable-specific heatmap functions.
Rework all the heatmap.* functions to use heatmap.gcam.
Old functions are retained so that I don't have to rewrite the other
scripts that use them.
Stop pasting the unnecessary 'x' on the beginning of the vector
component number.  This obviates the need to strip it off when we're
making plots, which makes the whole process a lot faster.