build: add +x to scripts pulling external dependencies

Make is less noisy for local building of dependencies like freeswitch
by storing the executable flag for the scripts
and not listing the resulting packages in artifacts/

.gitignore

@@ -4,7 +4,6 @@
 record-and-playback/playback-client-js/testmeeting/
 record-and-playback/playback-web/playback-web-0.1.war
 record-and-playback/.project
-push_to_git.py
 **/target/*
 **/.cache-main
 **/.cache-tests
@@ -25,12 +24,10 @@ bigbluebutton-web/.settings*
 bigbluebutton-web/.classpath
 bigbluebutton-web/.project
 akka-bbb-apps/akka-bbb-apps*.log
-bigbluebutton-html5/log/development.log
-bigbluebutton-client/.actionScriptProperties
 bigbluebutton-web/target-eclipse*
 record-and-playback/.loadpath
-clients/flash/**/build
-clients/flash/**/.gradle
 **/.idea/*
 *.iml
 *~
+cache/*
+artifacts/*