Alpha 1.4

1. Compiling and execution now detect AES-NI, or a lack of it, and fall back to a software AES implementation. This adds support for Raspberry Pi 4, related ARM processors and Celeron processors.
2. Added install instructions for CentOS/RHEL 8.1. Thanks to @A-Caccese for fixes to Windows WSL instructions.
3. Due to changes to the sqlite database that are not backwards compatible, re-synch will be required. Loading the blockchain only loads headers into memory instead of header blocks (header + proofs), speeds up the startup, and reduces normal operation memory usage by 80%. Memory access is now synchronous to reduce use of locks and speed up block processing.
4. Chia fullnode, farmer and harvester now default to logging to chia.log in the chia-blockchain directory. This is configured in config.yaml and due to config.yaml changes it is recommended to edit the new template config instead of using older config.yaml’s from previous versions.
5. Plotting working directory and final directory can both be specified in config.yaml
6. uvloop is now an optional add on.
7. Plotting now logs a timestamp at each major step. Thanks @dkackman who also fixed some compiler warnings. Additionally harvester/farmer will not try to farm plots that they don’t have the key for.
8. Added support for Python 3.8.