Cosmin: LineChart for Dispersion Values

Implemented an AnchorPane that will hold the LineChart. The LineChart
will be visible if the "Dispersion" Button will be toggeled and
dissapear in not.

The line chart currently contains the first 100 values gathered from
DispersiaAlgorithm. The input values for the algorithm are hardcoded

TO DO:
- Add textViews in the AnchorPane where input values for the dispersion
can be entered
- Make the Dispersion algorithm take a structure as a parameter that
holds the input values
- Make the dispersion algorithm take a parameter that says for how many
meters should the values be calculated
- Make the LineChart used to show the values from dispersion algorithm
be able to take in a step to show the values.
Merge branch 'master' of https://github.com/martonadi/EcoRisk