minor: Add method doc to IImproveAssetCache
minor: Add method doc to IImproveAssetCache

RavenB/opensim,ft-/arribasim-dev-tests,OpenSimian/opensimulator,ft-/opensim-optimizations-wip-tests,QuillLittlefeather/opensim-1,ft-/arribasim-dev-extras,ft-/arribasim-dev-extras,ft-/arribasim-dev-tests,OpenSimian/opensimulator,TomDataworks/opensim,Michelle-Argus/ArribasimExtract,M-O-S-E-S/opensim,ft-/opensim-optimizations-wip,QuillLittlefeather/opensim-1,RavenB/opensim,ft-/opensim-optimizations-wip-extras,OpenSimian/opensimulator,M-O-S-E-S/opensim,Michelle-Argus/ArribasimExtract,RavenB/opensim,BogusCurry/arribasim-dev,ft-/opensim-optimizations-wip-extras,ft-/arribasim-dev-extras,OpenSimian/opensimulator,OpenSimian/opensimulator,Michelle-Argus/ArribasimExtract,ft-/arribasim-dev-tests,Michelle-Argus/ArribasimExtract,TomDataworks/opensim,ft-/arribasim-dev-extras,QuillLittlefeather/opensim-1,QuillLittlefeather/opensim-1,ft-/arribasim-dev-extras,BogusCurry/arribasim-dev,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,ft-/arribasim-dev-tests,ft-/arribasim-dev-tests,M-O-S-E-S/opensim,ft-/opensim-optimizations-wip-extras,ft-/opensim-optimizations-wip-tests,BogusCurry/arribasim-dev,Michelle-Argus/ArribasimExtract,M-O-S-E-S/opensim,TomDataworks/opensim,OpenSimian/opensimulator,BogusCurry/arribasim-dev,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,BogusCurry/arribasim-dev,QuillLittlefeather/opensim-1,RavenB/opensim,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,M-O-S-E-S/opensim,QuillLittlefeather/opensim-1,ft-/opensim-optimizations-wip-extras,ft-/opensim-optimizations-wip,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,ft-/opensim-optimizations-wip,M-O-S-E-S/opensim,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,TomDataworks/opensim,TomDataworks/opensim,ft-/opensim-optimizations-wip-extras,RavenB/opensim,ft-/opensim-optimizations-wip-tests,ft-/opensim-optimizations-wip,Michelle-Argus/ArribasimExtract,ft-/opensim-optimizations-wip-tests,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,TomDataworks/opensim,QuillLittlefeather/opensim-1,RavenB/opensim,RavenB/opensim,ft-/arribasim-dev-tests,M-O-S-E-S/opensim,BogusCurry/arribasim-dev,TomDataworks/opensim,ft-/arribasim-dev-extras,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,OpenSimian/opensimulator,ft-/opensim-optimizations-wip-tests