Made parameters more explicit
Moved test-unload into test-load and unloaded lattice between the subsequent tests
Use p_load_single instead of require in p_temp
Use lattice instead of MASS
Cleaned up message in p_base
Updated variable names in p_exists
Fixed bug where p_isinstalled alwasy returned false
Corrected spelling errors in vignette
Modified parameters of p_isinstalled
Updated documentation: Generated by roxygen2 (4.0.1)