2021-10-19 (v2.0.0)

- add support for the Arty A7 100T board
- update flash part for Arty A7 35T board
- remove many unnecessary files
- increase Java memory to speed up the build
- test with Debian 11.1 bullseye 5.10.70-1 (2021-09-30)
- test with Vivado 2021.1
- test with Hex Five riscv-gnu-toolchain-20210618
- test with MultiZone Security TEE v2.2.1
- test with MultiZone Trusted Firmware v2.2.1
- update release assets with new bitstreams
- update readme