API for assets

[ethanstrominger]

• API for assets
• Asset API: Include asset group name #89
• Asset API: Include asset group topic areas #90
• Asset API: Include asset practice areas #91
• Table: Asset - Add asset_group_primary, include in asset API #92
• Table: Asset - Ensure only one asset_group_primary is true #93
• Asset API: Add asset users #94
• Asset API: Add asset tools #95
• Asset API: Query by asset group id #96
• Asset API: Query by asset group topic id #97
• Asset API: Query by asset group primary = Y or all #98
• Asset API: Query by practice area id #99
• Asset API: Query by asset user id #100
• Asset API: Query by asset tool id #101
• Asset API: Query by asset group name or asset name match #102