Read file, create new file with only the blocks of snippets in it
<p>I have a text file that looks like:</p>

<pre><code>text texttext texttext texttext texttext text
text texttext texttext texttext text
==========[start log]====
..
..
..
==============


testtextexttexttesttextexttext
testtextexttexttesttextexttext

==========[start log]====
..
..
..
==============
</code></pre>

<p>So I want to create a new file that just has the blocks of:</p>

<pre><code>==========[start log]=== 
..
..
..
=============
</code></pre>

<p>All <code>===</code> blocks have 2 blank lines below them.</p>

<p>The <code>...</code> inside the blocks is actually text.</p>
