(#193) - Randomly generate X amount of posts

This will randomly generate X amount of posts using this syntax:

<code>rake generate:posts n=40</code>

If you want to generate for a particular user instead of a random one:

<code>rake generate:posts n=40 uid=1</code>

If you want to pick the company as well:

<code>rake generate:posts n=40 uid=23421 cid=1236123</code>