Rewrote a2l/1 to allow a binary as the argument.
Fixed folsomite_server:expand_metric/1 for metrics with unknown type (for example, spiral).
Make more verbose error handling for gen_tcp:connect/4.
Merge pull request #2 from arcusfelis/arc-a2l-binary

Fixed issues with unkown metric types

merging after testing in our dev environment.

thanks to Uvarov Michael for the contribution!