Add failing test case for fully-specified thresholds (#4)
Semantic check for Gearman result test
Fix bug in threshold parsing

The first value, i.e., the one not preceded by a semicolon, was not
being recognised by the parser and therefore metric parsing was failing.
Modified the threshold parser to handle both cases correctly.

Closes #4.
Remove redundant things
Merge pull request #5 from anchor/fix-issue-4

Fix issue 4