WH-1658 - Fixed UX brokenness causing Guzzle errors.

  Now admin/config/tweetfetch should not bomb out before anything has been
  "saved" via this form.

	modified:   modules/tweetfetch/tweetfetch.admin.inc
	modified:   modules/tweetfetch/tweetfetch.install
WH-1658 - Fixed UX on admin/config/tweetfetch.

  Now all buttons use whatever input was last entered in tweetfetch_request
  textarea, not whatever was last saved. Now tweetfetch behaves as expected through
  the UI.

	modified:   tweetfetch.admin.inc