LoadSpace() is now reactive, so that it doesn't re-execute unless input logfile changes.

download table write.csv() does not write rownames
remove options from map layers dropdown and popups. close issue #1.

fix typo in loadLOG()
added leaflet legend.
added global.r file with a function for getting numerics from cut() factors.

used for making leaflet choropleth legend.
added leaflet choropleth legend.
defined function renderMap2.

a mod of rCharts::renderMap to append custom js to the HTML that shiny ui will render.
map viewer adjustments.

- radiobuttons instead of dropdown for layers.
- custom zoom controls with new renderMap2 function.