restructure: Prefix bin/ and tests/ with src/

This is a follow-up to commit
2ea8ea1275.

src/bin/run.sh

@@ -1,10 +1,11 @@
 #!/bin/sh
 
-# Move to the folder where ep-lite is installed
-cd "$(dirname "$0")"/..
+# Move to the Etherpad base directory.
+MY_DIR=$(cd "${0%/*}" && pwd -P) || exit 1
+cd "${MY_DIR}/../.." || exit 1
 
 # Source constants and useful functions
-. bin/functions.sh
+. src/bin/functions.sh
 
 ignoreRoot=0
 for ARG in "$@"; do
@@ -26,7 +27,7 @@ EOF
 fi
 
 # Prepare the environment
-bin/installDeps.sh "$@" || exit 1
+src/bin/installDeps.sh "$@" || exit 1
 
 # Move to the node folder and start
 log "Starting Etherpad..."