/fmstephe/fstrconv -> /fmstephe/flib/fstrconv

The standalone package fstrconv has been moved into the flib project.
Removed coordinator.Reliable(...)

This was an attempt at a reliable server. The implementation had severe
problems, including memory exhaustion. A reliable coordinator will be
built in the future, but a lot more research is needed in the meantime.
Removed ints/ package, using flib/fmath instead

The functions

ints.Combine(uint32, uint32)
ints.High32(uint64)
ints.Low32(uint64)

are replaced by

fmath.CombineInt32(int32, int32)
fmath.HighInt32(int64)
fmath.Lowint32Int64(int64)

with appropriate casts