• Add description of wind resource distribution table option to Help.

• Better defaults for speed/direction distribution table to illustrate how the table works.

• Rename options for clarity:

Name options (note that distribution table is for both speed an direction):

Choose Wind Resource File
Define Wind Speed Weibull Distribution
Define Wind Resource Distribution

Other options that are consistent with the other names might be:

Wind Speed Distribution Table
Wind Resource Distribution Table
Wind Speed Probability Table

Also note related issue on Wind UI forms: #533