Avoids a panic if a series ID exists in the tsm file but not in the IDs file.
Also handles the case were we don't have an ids file and just a tsm file.
This will read a tsm file and dump index, block and compression level info from the file.
It reads the file directly as opposed to reading it through the tsm engine which should
help with debugging and troubleshooting data file issues.
The implementation is not pretty but the output is very useful. In the future, we can
add data extraction, recovery and verification functionality if needed.
Jason Wilder
Philip O'Toole