Hall A Analyzer

Add support for "v2" detector maps to the detector classes to address the shortcomings of the current design.

I propose the following format:

detector_map = [tag] crate slot start end [logical] [M:model] [R:refchannel] [I:refindex] [P:plane] [S:signal] [, ...]

where

tag: optional "tag" (e.g. "L", "R") for grouping entries. Must be first item of each "line" and start with a letter.
crate: crate number
slot: slot number
start: first hardware channel
end: last hardware channel (inclusive)
logical: optional logical channel number associated with the "start" channel. Must be 5th plain number.
M: optional model number (not recommended, only for cross-check with the crate map)
R: optional reference channel
I: optional reference index
P: optional plane number
S: optional signal number (Hall C)

The items of each "line" are space-separated. Separate detector map "lines" (different crate/slot/channels) are comma-separated. All data are integer numbers, except for the optional leading tag.