update Azure platform name
Merge branch 'azure' into azure-1.1
add transaction management for select for update
remove compound unique index from introspection output
Merge branch 'azure' into azure-1.1
force outdated ODBC drivers to use legacy datetime type
Merge branch 'azure' into azure-1.1

Conflicts:
	sql_server/pyodbc/base.py
activate MARS automatically if available
Merge branch 'azure' into azure-1.1

Conflicts:
	README.rst
	sql_server/pyodbc/base.py