closes #117

* Default options are applied to calls to parse(), rels(), feeds() and process()
* Default options are overridden by options passed to the respective function call on a
  property-by-property basis
* Documented in README with example
* Added basic test (only for parse() behaviour)
* Also fixed a bug causing an error processing h-cards with no URL property

* Added isImgAlt static method to Formats\Mf2
* Used it in collectArrayURLValues and getPlaintext to handle cases where
  img+alt structures are encountered

Additionally disabled reporting of deprecation warnings while testing for
a cleaner output. All tests are passing.

closes #105

The test is checking for notes, but 'Bridge Fed' is, in fact, an article according to the post discovery algorithm. Also, I'm adding as note that the main difference between a note and an article is that the latter has a title, while the first doesn't.

* looks through the full mf2 tree for step 7 of authorship https://github.com/indieweb/authorship/issues/2
* if no author h-card is found, falls back to returning the author URL without other data instead of missing author

closes #95

if the document contains a link to the target, but that link is not in the parsed result, don't return an error, but also don't return the parsed document

closes #150

XRay now looks for images inside the HTML and does not consider those empty posts

To make it possible to consume feeds of pre-rendered Microformats2 JSON
data, we need to be able to discover that it is a Microformats2 JSON
file using the known MIME types documented  in
http://microformats.org/wiki/microformats2-mime-type

move target check outside of all format classes and operating on the final parsed JSON so that it works regardless of the input content type

for https://github.com/aaronpk/Aperture/issues/56

closes #89

closes #92

closes #86

more consistently returns HTTP 410 now

This adds a new property, "meta", which includes alt text and has room to include additional properties later.

closes #85

replaces #78

closes #79

* a single h-entry and h-card, where the h-entry has no URL, will result in a permalink page with that h-entry
* multiple h-entrys followed by an h-card is a feed

closes #77