Fixed code style inconsistencies.
Issue #2213867: Replaced deprecated form functions.
Issue #2232459: Added space and HTML tag opening to characters to break on when parsing video ID.
Issue #2213867: Fixed theme call of a thumbnail without an image style.
Fixed module description, package, and settings syntax.
Issue #2213867: Updated 8.x-1.x to work with Drupal 8 alpha 10.
Issue #1865284 by Vensdale: Fixed warning thrown when getting video_id from an empty value
removed accidental whitespace in README
Issue #1865284: updated README with newly acceptable video formats
Issue #1865284 by argiope, ttkaminski, misthero: added acceptable formats, fixed bug when video_id begins with v
Issue #2187393 by skurkee: fixed errors when switching between display formats
Issue #2160105 by Proteo: fixed bug with default thumbnail retrieval when video doesn't exist
Issue #1890436 by glynster: added option to save high resolution thumbnails if they exist
added initial Drupal 8 version (works with alpha6)
Issue #2077333: added responsive width size option in display settings
Issue #1571420 by rolfmeijer, misthero, kidrobot, jenlampton, others: added commonly used config options to module settings and field display settings.
Issue #2052073: Adding the general configure path to the info file
Issue #2052073 by Vacilando: Adding the general config path to the README
correct typo in readme
Issue #1859696: Adding additional tokens for video URL and image URL
Issue #1789844 by pikku-h, mErilainen: adding Feeds support, consolidating video_id fetching
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