Add autoclean for scripted use
Add autoclean for scripted use

  ./runprebuild.sh autoclean - cleans projects w/o prompting

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