Kingsthorpe

Minor changes

• 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

Bug fixes

• 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()