Gem containing KCL install+run Rakefile

[etipton]

Description of changes:

• Fixes some bugs with the sample application
• Adds a rubygem which provides:
  • rake task to install KCL .jar files
  • rake task to run KCL+MultiLangDaemon

Once the gem has been installed via bundler (gem name: aws-kcl-runner),

Install KCL jars like...

JAR_DIR=kcl_jars rake --rakefile `bundle info --path aws-kcl-runner`/Rakefile download_jars

Run KCL+MLD like...

JAVA_HOME=${JAVA_HOME:-/usr} \
JAR_DIR=kcl_jars \
properties_file=kcl.properties \
rake --rakefile `bundle info --path aws-kcl-runner`/Rakefile run

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