Includes the following changes:
- CORRECTION: Corrected a bug when using File mode before the creation of the backup directory or the first file inside
- CORRECTION: Corrected a bug with PlainText files loading (empty lines instead of dot filled lines)
- CORRECTION: Correction a bug with RunLengthEncoded files loading (multiplicator before the "$" character)
- NEW FEATURE: Automatic download and install of LifeWiki's pattern collection
- NEW FEATURE: Measuring evolution cycle duration and displaying it on the console in DEBUG mode
- OPTIMIZATION: Use integers when comparing the number of cell neighbours with the birth/survival rule
- OPTIMIZATION: Evolve or crop only the useful part of the game grid
- PRESENTATION: Improve PEP8 compliance