[libre-riscv-dev] Introduction

[Luke Kenneth Casson Leighton]

https://github.com/ucb-bar/berkeley-hardfloat/tree/master/src/main/scala

that looks actually semi-readable.  also located this:
http://www.jhauser.us/arithmetic/TestFloat.html

created the ieee754fpu repo:
git clone ssh://gitolite3@libre-riscv.org:922/ieee754fpu.git

already added the berkeley softfloat library as a git submodule, so
grab that with "git submodule init; git submodule update"

l.