Test expired returns false for valid cache

[lukechilds]

Resolves #1

[coveralls]

Coverage increased (+38.5%) to 92.308% when pulling 6f7ae73 on test into 972dd48 on master.

[coveralls]

Coverage increased (+38.5%) to 92.308% when pulling 7e08798 on test into 972dd48 on master.

[coveralls]

Coverage increased (+38.5%) to 92.308% when pulling da3cae0 on test into 972dd48 on master.

[coveralls]

Coverage increased (+38.5%) to 92.308% when pulling 6a3188526e71015548278f579c366097aa394f19 on test into 972dd48 on master.

[coveralls]

Coverage increased (+38.5%) to 92.308% when pulling 3b6a6d7 on test into 972dd48 on master.

[coveralls]

Coverage increased (+38.5%) to 92.308% when pulling 2455a21 on test into 972dd48 on master.

[coveralls]

Coverage increased (+38.5%) to 92.308% when pulling d83f051 on test into 972dd48 on master.

[coveralls]

Coverage increased (+38.5%) to 92.308% when pulling 7032918 on test into 972dd48 on master.

[coveralls]

Coverage increased (+38.5%) to 92.308% when pulling 9ffd87e on test into 972dd48 on master.

[coveralls]

Coverage increased (+38.5%) to 92.308% when pulling 66cb08c on test into 972dd48 on master.

[coveralls]

Coverage increased (+38.5%) to 92.308% when pulling edbae35 on test into 972dd48 on master.

[coveralls]

Coverage increased (+38.5%) to 92.308% when pulling bfe2862 on test into 972dd48 on master.

[coveralls]

Coverage increased (+38.5%) to 92.308% when pulling a39747b on test into 972dd48 on master.

[coveralls]

Coverage increased (+46.2%) to 100.0% when pulling 46b9291 on test into 972dd48 on master.