fix build with Ogre2

[rpaciorek]

• add FindOGRE to cmake build (Ogre2 don't install cmake config file)
• use macro OGRE_LOG_ERROR instead of direct use logError (no logError in Ogre2)
• re-add Ogre::SceneManager* to OgreOggListener (in Ogre2-only part) - constructor of MovableObject in Ogre2 need SceneManager

[paroj]

add FindOGRE to cmake build (Ogre2 don't install cmake config file)

this is a Ogre-Next bug, that should not be fixed here. Please drop this.

[rpaciorek]

add FindOGRE to cmake build (Ogre2 don't install cmake config file)

this is a Ogre-Next bug, that should not be fixed here. Please drop this.

Maybe bug, maybe not bug – providing specific config file for external build system is nice, but not obligatory.

If you don't want FindOGRE.cmake in this project repo (IMHO convenient for users), maybe use find_package(OGRE OPTIONAL_COMPONENTS Bites) instead of find_package(OGRE OPTIONAL_COMPONENTS Bites CONFIG) then it's possible use FindOGRE.cmake provided by Ogre-next by -DCMAKE_MODULE_PATH=/usr/local/lib/OGRE/cmake/