v1.3.3
Feature
(#283) 1.3.x cherrypick sync mem
Add a test that shows boring utils works in iotesters (#266)
This allows the PeekPokeTester to use peekAt and pokeAt with SyncReadMem (#274)
- Prior to this, it could be done with Mem but not SyncReadMemTest
- Changed peekAt and pokeAt to use MemBase as the type
- Added peek and poke in TreadleBackend to use MemBase