added space for formatting preference
added multiple clusters and fetching of available currencies
locations add themselves to correct market cluster
refresh.py now works with clusters of markers and exports a list of available currencies
added loading of currencies
added supports() fn to parser
passed currency to determine_icon
fixed string format error
turned c_clusters into a object so it wouldn't be undefined
reformatted the write_markers() fn so it doesn't overwrite itself on new currencies
add new layers as overlayLayers
added _litecoin image
added currency layers to map so they're on by default