Added requested changes

I may change `${BASH_SOURCE[0]}` by ` `basename $BASH_SOURCE` ` if you prefer

cscan.sh

@@ -1,12 +1,12 @@
 #!/bin/bash
 pushd "$(dirname ${BASH_SOURCE[0]})" > /dev/null
 if [ ! -d ./tlslite ]; then
-    echo -e "\ntlslite-ng not found, downloading..."
+    echo -e "\n${BASH_SOURCE[0]}: tlslite-ng not found, downloading..."
     git clone --depth=1 https://github.com/tomato42/tlslite-ng.git .tlslite-ng
     ln -s .tlslite-ng/tlslite tlslite
 fi
 if [ ! -d ./ecdsa ]; then
-    echo -e "\npython-ecdsa not found, downloading..."
+    echo -e "\n${BASH_SOURCE[0]}: python-ecdsa not found, downloading..."
     git clone --depth=1 https://github.com/warner/python-ecdsa.git .python-ecdsa
     ln -s .python-ecdsa/src/ecdsa ecdsa
 fi