wip: Merging SOCI 3.2.3 changes (current master) into develop.

Conflicts:
	.gitignore
	.travis.yml
	AUTHORS
	CHANGES
	cmake/SociBackend.cmake
	cmake/modules/FindODBC.cmake
	docs/installation.html
	include/soci/boost-fusion.h
	include/soci/boost-tuple.h
	include/soci/odbc/soci-odbc.h
	include/soci/prepare-temp-type.h
	include/soci/ref-counted-prepare-info.h
	include/soci/soci-platform.h
	include/soci/statement.h
	include/soci/use.h
	include/soci/version.h
	src/CMakeLists.txt
	src/backends/postgresql/test/test-postgresql.cpp
	src/backends/sqlite3/blob.cpp
	src/backends/sqlite3/test/test-sqlite3.cpp
	src/core/CMakeLists.txt
	src/core/test/common-tests.h
	tests/mysql/test-mysql.cpp
	www/index.html