Update script documentation

Author: allanrenucci

project/scripts/genDocs

@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 
-# Usage: ./genDocs <dotty-bot password>
+# Usage:
+# BOT_PASS=<dotty-bot password> ./genDocs
 
 set -e
 # set extended glob, needed for rm everything but x

project/scripts/sbt

@@ -1,5 +1,8 @@
 #!/usr/bin/env bash
 
+# Usage:
+# ./sbt <cmd>
+
 CMD="$1"
 
 if [ -z "$CMD" ]; then

project/scripts/sbtPublish

@@ -1,5 +1,8 @@
 #!/usr/bin/env bash
 
+# Usage:
+# SONATYPE_USER=<sonatype user> SONATYPE_PW=<sonatype pw> PGP_PW=<pgp pw> ./sbtPublish <publish cmd>
+
 # Release command:
 RELEASE_CMD="$1"