firebehavioR development

firebehavior 0.1.2

Two modifications to rothermel().
- Previously, if an input data frame had more than one row, rothermel() would solve for Crowning Index for only the first row of input data. This has been fixed.
- A constant used for unit conversion was corrected in the function. This will result is a slightly different Crowning Index.
One modification to fireChart().
- Previously, fireChart() could only plot one fire whereas the documentation led the user to believe multiple fires could be plotted on a fireChart. This has been fixed to allow for multiple fires.