Added basic tests for AbsentType, AbsentMimeType & WildcardType types.
Moved AbsentMimeType to under Mime namespace
Fix to WildcardType to allow absence of q factor to default to q factor of 1;
Added CharsetTypeFactory, TypeCOllection & tests.
Added EncodingTypeFactory & tests.
Docblock fix.
Added LanguageTypeFactory & tests.
Docblock fix.