Update RELEASE-NOTES.md

Adding links to documentation pages.
Update INSTALL.md

- Changing the Composer installation command to install the SWM 1.9.x branch of SMW (using the notation people find on packagist.org)
- Formatting the invocation of SMW in case of manual installation
- Fixing a link to documentation page (Upgrading)
Update RELEASE-NOTES.md

Added links to documentation pages
Merge pull request #60 from kghbln/patch-1

Update RELEASE-NOTES.md
Merge pull request #62 from kghbln/patch-3

Update RELEASE-NOTES.md
Update INSTALL.md

form to the composer command
Merge pull request #61 from kghbln/patch-2

Update INSTALL.md
Update INSTALL.md
(Bug 58991) Enable listed SpecialPages for the SMW\ContentProcessor

Adds $smwgEnabledSpecialPage and can be used to pages like RunQuery etc.

## Default
$GLOBALS['smwgEnabledSpecialPage'] = array( 'Ask' );

## SMW + SF related settings
$GLOBALS['smwgEnabledSpecialPage'] = array( 'Ask', 'RunQuery' );
Update RELEASE-NOTES.md

typo and formatting
Merge pull request #59 from SemanticMediaWiki/bug

(Bug 58991) Enable listed SpecialPages for InternalParseBeforeLinks hook (incl. SMW\ContentProcessor)
Fix Use of SpecialPage::getTitle was deprecated in MediaWiki 1.23

https://s3.amazonaws.com/archive.travis-ci.org/jobs/16240057/log.txt
Merge pull request #64 from kghbln/patch-4

Update RELEASE-NOTES.md
Merge pull request #65 from SemanticMediaWiki/tests

Fix Use of SpecialPage::getTitle was deprecated in MediaWiki 1.23
Merge branch 'master' of ssh://review/mediawiki/extensions/SemanticMediaWiki