Gene suggestions for 'Clock' yields Per2

```
(hg-server) ===========================================================================================================
[peter@mbi-cw-l10381 higlass-server] [master]$ python
Python 2.7.11 (default, Nov 17 2016, 17:37:33)
[GCC 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.42.1)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import tilesets.suggestions as ts
>>> ts.get_gene_suggestions('data/gene-annotations-mm9.db', 'Clock')
[{'chr': u'chr1', 'score': 394.0, 'geneName': u'Per2', 'txEnd': 93355905, 'txStart': 93312558}, {'chr': u'chr5', 'score': 308.0, 'geneName': u'Clock', 'txEnd': 76733817, 'txStart': 76638892}, {'chr': u'chr11', 'score': 283.0, 'geneName': u'Per1', 'txEnd': 68923459, 'txStart': 68912457}, {'chr': u'chr4', 'score': 69.0, 'geneName': u'Per3', 'txEnd': 150418774, 'txStart': 150377763}, {'chr': u'chr10', 'score': 41.0, 'geneName': u'Timeless', 'txEnd': 127689997, 'txStart': 127669118}, {'chr': u'chr12', 'score': 19.0, 'geneName': u'Cipc', 'txEnd': 88306316, 'txStart': 88287990}]
```