Optionally output directly to blob.
Create from lat and long.
Need to include zoom in lat/lng transformation.
Set default intensity.
Fix RMagick require
Merge with glenngillen/heatmap
Prevent rmagick from leaking memory
Update lib/heatmap/map.rb

Now you can do:

heatmap = Heatmap::Map.new( :width => 800, :height => 600 )
...
updaged gemspec
Merge pull request #3 from kapkaev/master

update to current changes