stacks: Simplify the get_stack view
stacks: Simplify query_stacks_html
tests: Get test_stacks working again
validators: Simplify the validate_stack function
tests: Temporarily disable a couple more of the sql_statement counts
stacks: Add a new colander ListStackSchema
stacks: Get the query_stacks service working for html and json with 'like' support
tests: Create a Package instance for the Stack in setUp
stacks: Allow querying stacks by name
tests: Remove some irrelevant commented-out stack tests
validators: Use Package.get for cleanliness purposes
stacks: Support querying stacks by packages
stacks: Add a SaveStackSchema
stacks: Add a save_stack service
tests: Test creating a new stack
tests: Test adding new packages to a stack
stacks: Add a delete_stack function
tests: Test deleting a stack