[trivial] fix code style
Change '.object.xxx' to 'object.xxx'
Add DsymbolTable parameter in Package::resolve
Add DsymbolTable::update with ident overload
Add Import::toChars()
Fix issue 313 & 314

+Make private imported symbol invisible

+Insert self module FQN in local package tree
Add workaround for (imp).mangleof and (imp).stringof
fix tests