exclude =: and :== in local definitions

Universally quantified types (parsing and inference)

Bug fix in reference marking

removed underscored allowed parameter of isUpperCaseName and isLowerCaseName
these routines now always look at the first non-underscore character
adjusted the names of some types and constructors in predef so that they start with an uppercase letter

idents that start with an underscore are only allowed in modules for which
the module name starts with an underscore
Because of this bug fix StdEnv has to be updated (_createArray in the Array class)

Fixed some bugs in generics

(bug_incomplete_instance_def, bug_layout_rule, bug_nested_guard_in_otherwise,
 parse-bug-18, parse_bug_Real_as_class_name, parse_bug_case,
 parse_bug_constructor_with_name_of_basic_type, parse_bug_lost_brackets_in_pattern,
 parse_bug_no_layout_rule)

are not implemented

Module because the compiler prefixes it with an underscore. As a result
multiple defined _Module-symbols were reported by the compiler.

out of range error reported by Peter.

optimize dot dot generators,
fixed bug in array comprehensions with more than one qualifier,
removed 'c' before 'cIsListGenerator' and 'cIsArrayGenerator'

fromString is not yet supported
some error handling improved
parial instances are temporary disabled

  from m import :: :+:

changed Declaration type
fixed crash when macro appears only in dcl module
added make with caching in 'main'
use BoxedIdent in hashtable

Tested with compiling Object IO and butstrapping.

checking of a whole dcl module component --> now cyclic module dependencies
should work

moved all switches to syntax module

"incorrect module header"
"module name ??? does not match file name"

of "v314", case defaults and guards now also have file position information.