ropensci/nasapower: Kingsthorpe

Updates documentation examples

Provides nicer method of printing data in R console

Updates tests for better coverage and removes non-functional tests

Removes dplyr as an Import

Corrects issue where if() was called with a vector of length 2 or more

Corrects logical operators && and || where they should be & or |

Removes extra code in create_icasa() and create_met() that peformed a duplicated check of latlon values

Removes unnecessary checks for latlon in get_power()