filter by created_at
update filter example for demonstrate filter by created_at
sample 102 android apps repo

filtered by the following

>>>Loaded JSON object: 77643
>>> created_at less than 2012-01-01 : 7020
>>> size less than 100000 : 6959
>>> size more than 3000 : 1173
>>> watchers_count more than 50 : 109
>>> forks_count more than 15 : 102
>>>Writing 102 json object(s)
>>>Done: filename is filter.txt
get user input for repo descriptions and root path for storing repos
Merge branch 'master' of https://github.com/analyzerepo/addp