Add release notes for version 3.0

Change-Id: Ie14da167794d0fc7b63c6ea93905c146d304ac81
Remove namespace

EXT:solr is compatible with TYPO3 4.5, which is supposed to run on PHP 5.2. Namespaces were introduced with PHP 5.3

Change-Id: Iaf37eca302fd30100c3a5830b331b668db099f90
Add transaction to Tx_Solr_IndexQueue_Queue->deleteItemsBySite()

Change-Id: Ie66f428b8f1b66c81ede069fb70581d20b10939a
[BUGFIX] SolrService checks synonyms for wrong type

It checked for an array, but json_decode provides a stdClass.
In test it worked, because the fallback to default language matched.

Resolves: #60432
Change-Id: Ia6853902c6af5167a58231825d5e0cb12bfe1b00
Reviewed-on: http://review.typo3.org/32105
Reviewed-by: Hans Höchtl <jhoechtl@gmail.com>
Tested-by: Hans Höchtl <jhoechtl@gmail.com>