[BUGFIX] Better handling for retweets

Sometimes the retweets are cut by twitter api. This patch rebuilts
retweets internally so they are not cut and links and tags are fully
available.

Release: 1.1
Change-Id: Id16b3a38640d4649fa271f107a0b11443cc10b31
Reviewed-on: https://review.typo3.org/25262
Reviewed-by: Nicole Cordes
Tested-by: Nicole Cordes