Added test case for input with wrong values at (see issue #8).
Checking the parsed date in the values at.
Using data driven testing in the wrongValuesAt test case.
Added data for the wrong value test case.
Checking for empty account name in the hm file.
Renames the wrongValuesAt test case to exceptions.
Added test cases for wrong input.
Merging with the hmReaderExceptions branch. Fixes #8.