add install and installed scripts to help with setup

install.sh

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+#!/bin/sh
+set -e
+dir=$(cd $(dirname $0); pwd)
+
+# Make sure the DBC folder for links to executables is available
+mkdir -p "$HOME/.dbc/bin"
+
+# Create symbolic links to ruby-shim and process-run-data
+ln -sf /usr/local/opt/student-activity-logger/ruby-shim $HOME/.dbc/bin/ruby
+ln -sf /usr/local/opt/student-activity-logger/uploader/process-activity-data.sh $HOME/.dbc/bin/process-activity-data
+
+# Add new PATH to .bash_profile so our ruby-shim is seen before the real ruby
+cat  >> ~/.bash_profile <<EOL
+
+# Add ruby-shim to path
+#   see: https://github.com/devbootcamp/student-activity-logger
+test -d \$HOME/.dbc/bin && PATH=\$HOME/.dbc/bin:\$PATH
+EOL
+
+# Install the plist file as a system daemon
+sudo cp -rf $dir/com.devbootcamp.student-activity-logger.plist /Library/LaunchDaemons
+
+# Load the plist file
+sudo launchctl load /Library/LaunchDaemons/com.devbootcamp.student-activity-logger.plist

installed.sh

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+# Confirm the launchd plist file is installed
+test -f /Library/LaunchDaemons/com.devbootcamp.student-activity-logger.plist
+
+# Confirm the symbolic links have been setup for the shim and batch processor
+test -L $HOME/.dbc/bin/ruby
+test -L $HOME/.dbc/bin/process-activity-data
+
+# Confirm that the path has been updated
+# source ~/.bash_profile # reload .bash_profile first, then test?  how is this done?
+test "$HOME/.dbc/bin/ruby" = "$(which ruby)"