Add more docs to dependencies-caching scripts

[ci skip]

script/cached-bundle

@@ -3,12 +3,18 @@
 #
 # After running `bundle`, caches the `vendor/bundle` directory to S3.
 # On the next run, restores the cached directory before running `bundle`.
+# When `Gemfile.lock` changes, the cache gets rebuilt.
 #
 # Requirements:
+# - Gemfile.lock
 # - TRAVIS_REPO_SLUG
 # - TRAVIS_RUBY_VERSION
 # - AMAZON_S3_BUCKET
 # - script/s3-put
+# - bundle
+# - curl
+#
+# Author: Mislav Marohnić
 
 set -e
 

script/s3-put

@@ -2,12 +2,16 @@
 # Usage: s3-put <FILE> <S3_BUCKET>[:<PATH>] [<CONTENT_TYPE>]
 #
 # Uploads a file to the Amazon S3 service.
+# Outputs the URL for the newly uploaded file.
 #
-# Depends on AWS credentials being set via env:
+# Requirements:
 # - AMAZON_ACCESS_KEY_ID
 # - AMAZON_SECRET_ACCESS_KEY
+# - openssl
+# - curl
 #
-# Outputs the URL of the newly uploaded file.
+# Author: Mislav Marohnić
+
 set -e
 
 authorization() {