Added the comments system

The comments system contains several different components so that it
works properly on a statically-generated website:

- The server component

  - bs-forms.php - Comment submissions are passed to this php file via
    an HTTP POST Request. This file will then validate the input,
    perform any necessary sanitization, generate a unique id for the
    comment, and then insert the comment in a SQLite database in YAML
    format. This file will ensure that the database exists and creates
    one if it does not.

- The local components

  - comments.rake - provides the system for managing comments and an
    interface for interacting with the database. Allows for pulling of
    the comments database from the server, reviewing the comments,
    publishing and unpublishing comments, deleting comments, and then
    pushing the locally modified database to the server

    In addition, will perform a server database check for any new
    comments that may have been submitted while local modifications were
    occurring. Merges any new comments as well as local modifications if
    necessary. Then will push the merged database to the server if the
    merge completed successfully.

    Also provides a "comments-generate" task which will generate a local
    directory of comments containing a file for each published comment
    in markdown format. Prior to the actual comment, each file contains
    YAML front-matter, the same way Jekyll posts do, containing comment
    meta-data. The comments directory can be easily deleted and
    regenerated using this task.

  - comments.rb plugin - This plugin reads the local directory of
    generated comments, if it exists. It will then parse the YAML
    front-matter as well as the main comment content and make this data
    available to Jekyll for compiling into the final static site output.
    This data will then be available for use through Liquid in post/page
    templates/layouts under the post/page object.

- Related fixes

  - _config.yml now contains remote server configuration for deployments
  - deploy script has been updated and is now fully functional
  - gitignore has been updated to ignore the comments database
  - bootstrap.rb has been updated to include comments database
    information

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>