Optimize png images

Change-Id: Ia5eeb69a6adf413a731a1a1d2d95226b25e465d9
Localisation updates from http://translatewiki.net.

Change-Id: I2d4711194f325ad69bae5a8f5e78a17ce2ae3dff
Localisation updates from http://translatewiki.net.

Change-Id: Ie811b755e871f0fb78c8dd9e54477629d7822d49
Localisation updates from http://translatewiki.net.

Change-Id: I8fb7a38f1e4fa20d15d4cb974f02e2e66936fded
Localisation updates from http://translatewiki.net.

Change-Id: I125f9e656c1d0026daef35c9ae58570599b2f849
Fixed Bug 42032

The bug is caused by more than one entry referring to special properties in the SMW IDs table. There are multiple reasons why this has happened:
* Predefined properties are stored by their keys (e.g., _TYPE) but if they also have a property page, this page will be called like their current label (e.g., "has type"); this was not matched
* The refresh script carelessly created refresh jobs even for predefined properties, thus refreshing pages with titles like "TYPE" that never existed.

Both problems surfaced due to the new way of producing Special:Properties.

The new code requires Store3 to be reset and recreated to fix any existing problems caused by the earlier misbehaviour. A simple refresh is not going to delete the obsolete ID entries.

Note for review: SMW_Sql3SmwIds.php applies some inconsistent naming for new symbols. The old ones should be fixed in another commit, but this is not release critical and would require more far-reaching changes since some of the methods that should be renamed are public. Can be done in SMW 1.9.

Change set 2: Using property IDs (with property keys instead of titles) in all places where a property is used requires us to also reconstruct wikipage DIs from such IDs now. If a predefined property is used as a property value, then this is necessary. The DIHandler for wikipage has been augmented to do this, and all code that created SMWDIWikipage from SMW ID table contents is now calling the handler instead. Also fixed a lot of documentation.

Change-Id: Ifd6267cbd3fca1c3bee1b1927c70b91bd8128356
Fix to bug 36314

* Capitalise first letter with function Language::ucfirst()
* Case-insensitive search $stoppatern in function readChunkget

Change-Id: I9b27509dc71ff965667302a2fec50823fb69a710
Localisation updates from http://translatewiki.net.

Change-Id: I0712a70563dfe6d843624e2d4d9b13b14c43a041
Merge "Optimize png images"
minor code cleanup

Change-Id: I315ecdce4387d4b72ca0bee5cc3d879a894422ce
SMWQueryProcessor::getResultPrinter take only two param
Merge "Fixed Bug 42032"
Store3 as default; updated documentation files

Getting ready for the release.

* Reorganised RELEASE-NOTES to separate user enahncements from code enhancements; added some things forgotten so far; clarified some formulations
* Updated INSTALL (might need update again when migration script is working; I suggest to keep the "slow" method documented as a backup in any case)
* Switched to Store3 as the default (but INSTALL has instructions for upgrade to avoid surprises)

Change-Id: Ia6766b03bdb72e1d89a6cdb88a7688c0391acf5f
Merge "minor code cleanup"
Merge "Store3 as default; updated documentation files"
style improvements

Change-Id: I6dfb4dd5b7b0fd8dd6868e389d702c147e172065
Merge branch 'master' into 1.9.x

Change-Id: I0aafa5ac2f76077b2c401cf4aa383d61304cf653