added float32 to the specification
each *float64* thing gave birth to a *float32* equivalent
added float32 support
partial correction of write_untagged_float32
not any idea for read_untagged_float32 and write_untagged_float32
completed write_untagged_float32 and read_untagged_float32
Merge pull request #8 from HappyCrow/float32_support

Float32 support