Changes:
This update adds PlaceholderAPI support with custom placeolders!

If you want to use any placeholders, you will need PlaceholderAPI

Placeholders:
%evo_{tree_name}_energy%
Shows the players energy in the specified skill tree.
ex.)
%evo_nether_energy%
%evo_earth_energy%
%evo_end_energy%

%evo_{tree_name}_next%
Shows the name of the next skill in the specified skill tree.
ex.)
%evo_nether_next%
%evo_earth_next%
%evo_end_next%

This update should allow you to use theese values in custom scoreboards and more!

Enjoy!