Renamed package to gwtrigfind

[duncanmmacleod]

This PR renames the package trigfind -> gwtrigfind to align with new gwdatafind package.

[coveralls]

Pull Request Test Coverage Report for Build 64

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 97.665%

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Totals
Change from base Build 62:	0.0%
Covered Lines:	251
Relevant Lines:	257

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💛 - Coveralls