Search - Increase Performance by Separating Name and Email Criteria and Wildcard String Tail Only

Rationale
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Currently, both Basic and Advanced Search provide a single search criteria field which queries on sort_name AND email address data, AND adds % wildcard to both front and back of string. This results in extremely inefficient queries, particularly problematic in larger datasets.

Implementation
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• Modify Advanced Search forms to provide separate "Name" and "Email" input fields.
• Modify search query construction to NOT automatically wildcard the beginning of either of these critieria. The tails should still be wildcarded.

EXAMPLE:
Name: Green
Email: %yahoo

Query contains:
LEFT JOIN civicrm_location.... civicrm_email LIKE '%yahoo%'
WHERE civicrm_contact.sort_name LIKE 'Green%'