fmul works in 2 stages (1 latch)
fadd works in 2 stages
delete unnecessary files
itof works in 4 stages
ftoi works in 1 stage
finv works in 5 stages.
fsqrt works in 5 stages
trivial change
fdiv works in 7 stages
clean up test benches
Merge pull request #1 from cpuex2014-4/remove-latch

Remove latch