ENG-3752 SQL CAST among numerics and VARCHAR.
Merge branch 'master' into ENG-3752-cast
Merge branch 'master' into ENG-3752-cast

Conflicts:
	src/hsqldb19b3/org/hsqldb_voltpatches/Expression.java
Support float-to-decimal casts with proper overflow checking.
Merge branch 'master' into ENG-3752-cast
whitespace change for license check
Tweak NValue.hpp template instantiation to satisfy OSX10, reduce numeric function test framework bulk.
Licensecheck whitespace again.
Merge branch 'master' into ENG-3752-cast
Integrate review feedback into NValue CAST support, r=jhugg.
Merge pull request #372 from VoltDB/ENG-3752-cast

ENG-3752 SQL CAST among numerics and VARCHAR.