New command: info

I have added a command to FACS called 'info'. Please have a look. The main purpose is to be able to inspect the bloom filter files. 

Please add other params from the filter if possible! There were items in the bloom data structure which I did not understand, such as "dx" and "mcf". Also, it would be cool if the name of the original reference file was recorded in the Bloom file, unless one has a fixed sized buffer. But that seems to be a small undertaking with very low priority.

It compiles and runs for me.