add SQL Anywhere configuration documentation
skip unsupported test on SQL Anywhere
implement SQL Anywhere driver exception conversion
return 0 by default for exception conversion
make driver method for constructing the DSN private
wrap driver connection exceptions
rebase with master
Merge pull request #415 from deeky666/skip-unsupported-tests-on-sql-anywhere

Skip unsupported tests on SQL Anywhere
Merge pull request #412 from deeky666/add-sql-anywhere-documentation

Add SQL Anywhere configuration documentation
fix driver implementation
readd use statment
Merge pull request #411 from deeky666/add-sql-anywhere-driver-exception-handling

Implement SQL Anywhere driver exception conversion