Support API search

[Tim Herzog]

[Tim Herzog]

Here's the sample search query from the help desk:

http://api.worldbank.org/v2/sources/2/search/solid%20fuel

[Tim Herzog]

I'm thinking an interface like this:

def search(phrase, labels=False, fields=False):

• phrase: search phrase
• labels: include names of matching results, for ones that map to concepts
• fields: include metadata fields and their values (in which the matches were found)

Returns: a generator of metadata objects