[WIP] Issue List Command

Command to list issues

````bash
./bin/gsh issues:list symfony-cmf RoutingAutoBundle  --filter=created --sort=created --direction=desc --since="6 months ago"            
+----+-------+------------------------------------------------------+-----------+-----------+-----------+-------------+---------------------+
| #  | State | Title                                                | User      | Assignee  | Milestone | Labels      | Created             |
+----+-------+------------------------------------------------------+-----------+-----------+-----------+-------------+---------------------+
| 48 | open  | review configuration xml schema                      | dbu       | WouterJ   |           |             | 2013-12-27 09:23:09 |
| 45 | open  | Support "pattern" option for AutoIncrentPath Provi.. | dantleech |           |           |             | 2013-12-17 11:28:28 |
| 44 | open  | [Form] port prestacms url creation widget to cmf     | dbu       |           |           | enhancement | 2013-12-09 08:37:41 |
| 43 | open  | Improved and fixed ContentMethod::normalizePathEle.. | WouterJ   |           |           |             | 2013-12-08 14:41:36 |
| 42 | open  | Url's without content_path                           | webberig  |           |           |             | 2013-12-01 21:02:15 |
| 41 | open  | Allow use of content_change strategy in non-buildi.. | dantleech |           |           |             | 2013-11-29 21:31:38 |
| 37 | open  | [WIP] Branch for refactoring to enable actions on .. | dantleech |           |           |             | 2013-11-09 19:28:58 |
| 34 | open  | Specify action on content rename                     | dantleech |           |           |             | 2013-11-03 09:42:13 |
| 32 | open  | Support MultiLingual routes                          | Bertjh    |           |           |             | 2013-10-24 07:46:34 |
| 26 | open  | upgrade to new Bundle persistence standards          | lsmith77  |           |           |             | 2013-07-31 07:31:01 |
| 25 | open  | upgrade to new Bundle standards                      | lsmith77  |           |           | Easy Pick   | 2013-07-31 07:30:42 |
+----+-------+------------------------------------------------------+-----------+-----------+-----------+-------------+---------------------+

11 issues in 0.73s

````