Updating Pandoc install link in Readme
Don't strip output of pandoc

For markups like Markdon, spaces in output can potentially be significant (e.g. code). Therefore, they should not be stripped.
Specifying mocha version.

This version of mocha avoids the following error:

    No Mocha monkey-patch for MiniTest version
Merge remote-tracking branch 'origin/pr/5'

* origin/pr/5:
  Don't strip output of pandoc
Updating tests for gh-5

See commits:

* 2f1f34099
* 01faf2e1b
Version bump to 0.6.1
Regenerate gemspec for version 0.6.1
Regenerate gemspec for version 0.6.1
Now supports direct binary output.
Merge pull request #6 from wiegand/feature-binary-support

Now supports direct binary output.

Pull request description:

pandoc supports several binary output formats (i.e. odt, docx, epub, and 
epub3), however pandoc requires these to output to files instead of dumping
the binary to standard output. From the README:

> Output goes to stdout by default (though output to stdout is disabled for
> the odt, docx, epub, and epub3 output formats).

This pull request eliminates this restriction by outputting the binary
directly to standard output for odt, docx, epub, and epub3 output formats.
(It also adds the missing epub3 output format.)

Benefits:

* binary support!
* the API now works consistently across all output formats
* much easier in cases where you want to dynamically serve some exported data
  in a variety of formats to a users of your web application, i.e. no more
  fiddling with files
Updating Readme format information.
Updating development and test bundler gems.
Version bump to 0.7.0
Removing Jeweler dependency.

Jeweler is locked to older versions of Ruby and is largely unnecessary,
so removing in favor of just using the gem command.

In the process, adding rake to the Gemfile and using string array
shortcut for file list in gemspec.
Version bump to 0.7.1
Simplifying option stringification.

The `#convert_options` method was convoluted, so replacing with a
slightly clearer series of option stringification methods.
Refactoring binary conversion.

Avoiding traversing the option list twice to determine whether to output
binary. Also making it clearer that there is string and binary output by
creating a method for each one.

The output file option is set explicitly here, which is hacky but retains
the existing temp file behavior. However, this could cause problems if a
user specifies their own output option, so this will need to be updated.
Updating PandocRuby::WRITERS to include binary writers.
Renaming #stringify_options to #prepare_options

Since the method does more than simply convert them to strings, this
method name is more accurate.
Adding documentation and removing explicit self from private method calls.