Fixing of issue 280

[jthoene]

This fixes #280

The test coverage for compiler errors, warnings and it's quickfixes, now looks like the following:

Compiler Error/Warning	Quickfix Status
ERROR_CONSTANT_MODIFIER_WAS_REMOVED	Quickfix tested
ERROR_DATA_LOCATION_MUST_BE_CALLDATA_FOR_EXTERNAL_PARAMETER	Quickfix tested
ERROR_DATA_LOCATION_MUST_BE_MEMORY_FOR_PARAMETER	Quickfix tested
ERROR_DATA_LOCATION_MUST_BE_MEMORY_FOR_RETURN_PARAMETER	Quickfix tested
ERROR_DATA_LOCATION_MUST_BE_MEMORY_OR_STORAGE_FOR_RETURN_PARAMETER	Quickfix tested
ERROR_DATALOCATION_MUST_BE_STORAGE	Not reproducable
ERROR_DATA_LOCATION_MUST_BE_SPECIFIED_FOR_VARIABLE	Quickfix tested
ERROR_DATA_LOCATION_MUST_BE_STORAGE_OR_MEMORY_FOR_PARAMETER	Quickfix tested
ERROR_FUNCTION_DECLARED_AS_PURE_BUT_MUST_BE_VIEW	Not reproducable
ERROR_FUNCTION_DECLARED_AS_VIEW_BUT_MUST_BE_PAYABLE_OR_NON_PAYABLE	Quickfix tested
ERROR_FUNCTION_NAME_EQUALS_CONTRACT_NAME_DISALLOWED	Quickfix tested
ERROR_INVALID_IMPLICID_CONVERSION_TO_ADDRESS_PAYABLE	Quickfix tested
ERROR_MEMBER_TRANSFER_NOT_FOUND_OR_VISIBLE	No Quickfix available
ERROR_NO_VISIBILITY_SPECIFIED	Quickfix tested
ERROR_STATE_MUTABILITY_ONLY_ALLOWED_FOR_ADDRESS	Quickfix tested
ERROR_THROW_KEYWORD_DISALLOWED	Quickfix tested
ERROR_VAR_KEYWORD_DISALLOWED	Quickfix doesn't work because of issue #299
ERROR_YEARS_IS_DISALLOWED	Quickfix tested
ERROR_DEPRECATED_SUICIDE	Quickfix tested
ERROR_DEPRECATED_SHA3	Quickfix tested
ERROR_INTERFACE_FUNCTIONS_CAN_NOT_HAVE_MODIFIERS	Quickfix tested
ERROR_MSG_VALUE_ONLY_ALLOWED_IN_PAYABLE	No Quickfix available
WARNING_DEPRECATED_CALLCODE	Overshadowed by an error
WARNING_DEPRECATED_FUNCTION_CONSTRUCTOR	Overshadowed by ERROR_FUNCTION_NAME_EQUALS_CONTRACT_NAME_DISALLOWED
WARNING_DEPRECATED_NAMED_FUNCTION_PARAMETERS	Not producable by the compiler
WARNING_DEPRECATED_NAMED_FUNCTION_RETURN_VALUES	Not producable by the compiler
WARNING_DEPRECATED_SHA3	Overshadowed by ERROR_DEPRECATED_SHA3
WARNING_DEPRECATED_SUICIDE	Overshadowed by ERROR_DEPRECATED_SUICIDE
WARNING_DEPRECATED_THROW	Overshadowed by ERROR_THROW_KEYWORD_DISALLOWED
WARNING_FILE_NO_PRAGMA_SOLIDITY	Quickfix tested
WARNING_FUNCTION_STATE_MUTABILITY_PURE	Quickfix tested
WARNING_FUNCTION_STATE_MUTABILITY_VIEW	Quickfix tested
WARNING_FUNCTION_UNUSED_PARAMETER	Quickfix tested
WARNING_FUNCTION_VISIBILITY	Overshadowed by ERROR_NO_VISIBILITY_SPECIFIED
WARNING_LOCAL_VARIABLE_UNUSED	Quickfix tested
WARNING_MSG_VALUE_IN_NON_PAYABLE	Overshadowed by ERROR_MSG_VALUE_ONLY_ALLOWED_IN_PAYABLE
WARNING_SHADOWED_DECLARATION	No Quickfix available
WARNING_SOLIDITY_VERSION_NOT_THE_DEFAULT	Warning seems to be removed by the newer compiler version
WARNING_USSAGE_OF_SEND	Quickfix tested
WARNING_VARIABLE_STORAGE_POINTER	Overshadowed by an equivalent error, which is not documented by us at the moment