Added recognition of MOPAC 2007, 2009 and 2012 output files.

Signed-off-by: John May <john.wilkinsonmay@gmail.com>
includes suggestions from John May

https://github.com/cdk/cdk/pull/36

Signed-off-by: John May <john.wilkinsonmay@gmail.com>
added unit tests for MopacFormats 2007,2009 & 2012

Signed-off-by: John May <john.wilkinsonmay@gmail.com>
updated older Mopac formats and unit tests

Signed-off-by: John May <john.wilkinsonmay@gmail.com>