Makes use simpler. The setools submodules map 1:1 to classes anyway;
the separate modules are simply to ease organization.
Change seinfo to use conditional setter use rather than conditional
instantiation of queries. Note: pylint disable is added because pylint
gets confused by the reuse of the q variable and thinks that q is always
BoolQuery, so it incorrectly reports missing member functions.
Fix the exposed bugs in PermissionMap. Add an exception for parse errors
in the permission map file parser, as SyntaxError is not the correct
exception.
Group all exception classes into a module for each package. This is the
first step towards having all exceptions raised by setools libs be a child of
SEToolsException.
