Fix merge error in 0.55 

Blob support, multiple new datatypes and small fixes - ddl2cpp: - add multiple data types - option to not camel-case SQL names in C++ - allow digits in names - Allow tuples to be passed to insert_set - Fix some static_assert messages

Use date/date.h (as in date 2.4) Small fixes

Trim function (Juan Dent) Hopefully fixed compile issues with VC++

support for date/datetime/timestamp types added for ppgen Fix without_table_check for alias expressions several automated edits using clang-format

Silence a couple of warnings (clang-tidy and gcc-6.x) 

Maintenance release: - compile with MSVC 2017 again	- remove some clang warnings - Fixed incorrect usage of string::find

Add get default transaction isolation level function (thanks volka) 

Appease MSVC 2015 Update 3 

Appease MSVC (I hope)