PredictiveEcology/SpaDES: v1.3.1

Known issues: https://github.com/PredictiveEcology/SpaDES/issues

• Default module path (set via spades.modulePath option) is now set to a temporary location to avoid unintentionally writing to the user's home directory.
• add options for cache, input, output dirs (defaults to a temp dir until changed by user)
• rename spades.modulesPath and spades.modulesRepo options to spades.modulePath and spades.moduleRepo
• New cache-related functions: showCache and clearCache