v2.0

What's Changed

• Hydrogen soc by @saursin in #20
• Fpga Implementation of HydrogenSoC on Spartan6 Mini by @saursin in #22
• Better libc for RISCV-Atom by @saursin in #23
• Vuart by @saursin in #24
• Even Better Libc by @saursin in #25
• Dev by @saursin in #26
• Gpio by @saursin in #27
• Dualport Imem Added by @saursin in #28
• Better Printf & new libraries by @saursin in #31
• Add Software Implemented SPI by @saursin in #32
• Added basic CSR unit with cycle register by @saursin in #33
• Fix Atombones build by @saursin in #35
• Refactor RTL by @saursin in #36

Full Changelog: v1.2...v2.0