improve supporting shared library, add install targets (fix #20)

Many thanks to Richard Shaw <hobbes1096@gmail.com>
Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>
Merge pull request #21 from ignatenkobrain/shared

improve supporting shared library, add install targets (fix #20)
Fix installing static libs

Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>
Merge pull request #22 from ignatenkobrain/shared

Fix installing static libs
install headers

Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>
Merge pull request #23 from ignatenkobrain/install_headers

install headers
shiny.OgrePlatform.so should be installed in libdir

Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>