Patch for Julia 0.5.1.

[lukasvermeer]

This commit allows the quickstart code to run on the latest version of Julia (0.5.1). Quite a few methods and some syntax has been deprecated in the last two years. This patch replaces these with the equivalent new methods and syntax.

Included changes:

• Rewrite deprecated Dict declarations.
• Use String instead of deprecated ASCIIString.
• Use Int instead of deprecated int.
• Use ceil(Integer, x) instead of deprecated iceil(x).
• Use floor(Integer, x) instead of deprecated ifloor(x).
• Import PyPlot to automatically resolve matplotlib dependency.
• Explicitly convert E, tua_s and tua_p to Integer when needed. (nasty!)
• Use Range instead of Range1. (typo?)

Tested using http://cyrusmaher.github.io/CauseMap.jl/Quickstart.html. I did not test with any other data or settings.

The graph output looks aesthetically different, but seems okay in terms of the data. I suspect this is the result of changes to matplotlib, but I did not investigate further.

I believe this commit also fixes #12 and fixes #13.

[lukasvermeer]

For reference, after making these changes, I get the following graphical output.