sapling.rb: Multiple fixes

- Add logic for Planter, the editor module
- Add logic for catching a bad switch, and reporting accordingly
- Add logic for when no tree is included when required, and reporting
  accordingly
- Move YAML file loading from Dialogue/Gardner to here

lib/sapling.rb

@@ -6,6 +6,7 @@ require 'yaml'
 require_relative 'sapling/dialogue'
 require_relative 'sapling/gardner'
 require_relative 'sapling/planter'
+require_relative 'sapling/utility'
 
 # Sapling is the main module for the program. From here, the rest of the world
 # starts building.
@@ -31,29 +32,50 @@ module Sapling
                "Begin traversing the provided dialogue tree") do
 
           if ARGV.empty?
+            puts "No tree file provided. Please provide a tree file."
             puts opt_parser
             exit
           end
 
-          unless Gardner.verify_tree(ARGV[0])
+          unless verify_tree(ARGV[0])
             puts "\n#{opt}\n"
             exit
           end
 
+          puts "Welcome to Sapling, a Dialogue Tree Utility.\n"
           speaker = Dialogue::Speaker.new
-          speaker.file = ARGV
+          speaker.file = YAML.load_file(ARGV[0])
           speaker.conversation
         end
 
         opt.on("-e", "--edit",
                "Create or edit a dialogue tree") do
-          puts "We gonna make a tree!"
+
+          if ARGV.empty?
+            puts "Creating a new tree."
+            tree = SKELETON_TREE
+          else
+            puts "Using tree at #{ARGV[0]}."
+            unless verify_tree(ARGV[0])
+              puts "\n#{opt}\n"
+              exit
+            end
+            tree = YAML.load_file(ARGV[0])
+          end
+
+          puts "Welcome to Sapling, a Dialogue Tree Utility.\n"
+          gardner = Planter::Spade.new
+          gardner.file = tree
+          gardner.plant
         end
 
       end
-      opt_parser.parse!(options)
 
-      if ARGV.empty?
+      # Hacky way of dealing with bad options
+      begin
+        opt_parser.parse!(options)
+      rescue OptionParser::InvalidOption
+        puts "Invalid option."
         puts opt_parser
         exit
       end