Split plugin classes and derive AIFilePicker from BasicPluginBase (part 3).

This commit deletes all indra/media_plugins and copied one-on-one
the indra/plugins directory from my (imprudence) statemachine branch
(which contains the AIFilePicker patch).

git shows this as a lot of 'renamed' files because originally it
was a rename. However, there are a lot of changes as well: it's both
an upgrade to a newer plugin system (changes by LL) as well as an
upgrade to my refactored plugin system with a file picker as plugin.

Since this commit is a one-on-one copy, it disregards any changes
that were in Singularity and not in imprudence in indra/media_plugins
however. I will add those back in the next commit.

indra/plugins/gstreamer010/CMakeLists.txt

@@ -0,0 +1,61 @@
+# -*- cmake -*-
+
+project(media_plugin_gstreamer010)
+
+include(00-Common)
+include(LLCommon)
+include(LLImage)
+include(LLPlugin)
+include(LLMath)
+include(LLRender)
+include(LLWindow)
+include(Linking)
+include(PluginAPI)
+include(MediaPluginBase)
+include(FindOpenGL)
+
+include(GStreamer010Plugin)
+
+include_directories(
+    ${LLPLUGIN_INCLUDE_DIRS}
+    ${MEDIA_PLUGIN_BASE_INCLUDE_DIRS}
+    ${LLCOMMON_INCLUDE_DIRS}
+    ${LLMATH_INCLUDE_DIRS}
+    ${LLIMAGE_INCLUDE_DIRS}
+    ${LLRENDER_INCLUDE_DIRS}
+    ${LLWINDOW_INCLUDE_DIRS}
+    ${GSTREAMER010_INCLUDE_DIRS}
+    ${GSTREAMER010_PLUGINS_BASE_INCLUDE_DIRS}
+)
+
+### media_plugin_gstreamer010
+
+set(media_plugin_gstreamer010_SOURCE_FILES
+    media_plugin_gstreamer010.cpp
+    llmediaimplgstreamervidplug.cpp
+    )
+
+set(media_plugin_gstreamer010_HEADER_FILES
+    llmediaimplgstreamervidplug.h
+    llmediaimplgstreamertriviallogging.h
+    )
+
+add_library(media_plugin_gstreamer010
+    SHARED
+    ${media_plugin_gstreamer010_SOURCE_FILES}
+)
+
+target_link_libraries(media_plugin_gstreamer010
+  ${LLPLUGIN_LIBRARIES}
+  ${MEDIA_PLUGIN_BASE_LIBRARIES}
+  ${LLCOMMON_LIBRARIES}
+  ${PLUGIN_API_WINDOWS_LIBRARIES}
+  ${GSTREAMER010_LIBRARIES}
+)
+
+add_dependencies(media_plugin_gstreamer010
+  ${LLPLUGIN_LIBRARIES}
+  ${MEDIA_PLUGIN_BASE_LIBRARIES}
+  ${LLCOMMON_LIBRARIES}
+)
+