Allows blank lines to be counted as code fragments, addresses #189

This makes it possible to have adjacent blocks of comments where the later
block is directly related to the following snippet; examples are given in #189,
as well as below:

```coffeescript
# This is an introductory paragraph that explains the junk we're gonna do in
# this part of the code in detail.

# This is a paragraph of information about the first snippet of code; the
# following code snippet will align with this paragraph, not the previous one.
#
# This is another paragraph of info about the following code snippet. Note that
# the code will not align with this paragraph but with the previous one.
thisIsTheCode
```