Rename OperationMethod to Method
Rename Operation to Command
Move name validation from Command to Node
Validation/error naming
Method/test organization/ordering
Use specific *_errors methods in Command.t
Merge pull request #18 from iferguson90/more-renaming

More renaming
Allow parallel-by specifications to be grouped
Test parallel_by flattening
Merge pull request #19 from iferguson90/master

Second attempt: Allow parallel-by specifications to be grouped
Update README.md
Renmame command to task
Add missing use statements
Move modules related to rename
Merge branch 'master' of github.com:davidlmorton/ptero-perl-sdk

Conflicts:
	lib/Ptero/WorkflowBuilder/Detail/Node.pm
	t/WorkflowBuilder/Detail/Operation.t