added crmInsightly class

Added crmInsightly class. Requires further testing - Insightly only
allows API access for paying customers, returns a 401 Unathorized error
when used with a free account.
Revert "added crmInsightly class"

This reverts commit 31fa16054bb5fd44eefbc1fbb6514b60921ee5f7.
Added crmInsightly class

Requires further testing, Insightly only allows API access for paying
users, returns 401 Unauthorized error when using a free user API key