Update bin/install-mongo-extension.sh

- Better check for already installed mongo-module
- Removed addition of mongo to php.ini; "pecl install" does this automatically now
Update README.md
Update README.md

changed "use Zend\Stdlib\ObjectProperty;" to "use Zend\Stdlib\Hydrator\ObjectProperty;"
Merge branch 'hotfix/1'

Close #1
Merge branch 'patch-1' of git://github.com/RomanKonz/PhlyMongo into hotfix/2
Merge branch 'hotfix/2'

Close #2
Merge branch 'patch-2' of git://github.com/RomanKonz/PhlyMongo into hotfix/3
Merge branch 'hotfix/3'

Close #3