* added new date pattern

[RobWei]

Recently i got this ValueError.
pycaching.errors.ValueError: Unknown date format - '12.06.20'.
My GC profile language is german.
So i added date format "%d.%m.%y".

[coveralls]

Coverage remained the same at 94.938% when pulling c176d68 on RobWei:time-format into 45ef698 on tomasbedrich:master.

[FriedrichFroebel]

Thanks for your PR. Please enrich the existing test case as well to represent this additional pattern (function test_parse_date in module test_util).

[RobWei]

I added the test. I hope it's done right.

[FriedrichFroebel]

Unfortunately not completely: You are fixing the parser in util.py, but your new test is for the formatter.

In lines 17 and 18 of test_util (in test_parse_date) there should be the same patterns as in parse_date (they are actually out of sync already, so feel free to just copy over the the patterns variable or add "%d-%m-%Y" there as well).

[FriedrichFroebel]

Fixed in #201.