Dynamics CRM Solutions understand how managed unamanage solutions are merged and how they work

https://msdn.microsoft.com/en-us/library/gg309329.aspx

https://crmbusiness.wordpress.com/2014/03/31/crm-2013-overview-of-solutions/

Biztalk & CRM Actions

http://blog.eldert.net/integrating-crm-2011-with-biztalk-2010-continued/

Filter lookup of subgrid

For later...

CRM 2015: Applying custom FetchXml to a subgrid using JavaScript