Add console methods.
Add create_method, limit, exclude_attributes, and append options to console methods.
Flesh out environment module.
Fix console_methods spec name.
Remove vestigial code.
Remove defunct changelog.
Tweak dump formatting.
Rename ConsoleMethods to DumpMethods.
Update gemspec.
Remove documentation on vestigial option.
Shorten exclude_attributes option to exclude.
Remove create_method option.
Add BATCH_SIZE environment option.
Add MODEL environment option.
Update README.