do not inject SOURCEDIR and BUILDDIR into the environment of
build steps and run configurations any more.
instead, all custom executable paths, argument lists and working
directories now support the %{sourceDir} and %{buildDir} macros.
this approach is more elegant and more scalable.

get away from argument stringlists. instead, use native shell command
lines which support quoting/splitting, environment variable expansion
and redirections with well-understood semantics.

Task-number: QTCREATORBUG-542
Task-number: QTCREATORBUG-1564

make it provide a macroExpander() instead of a resolve() function.
this detaches the actual variable management from the string
manipulation.

this is less confusing, because it doesn't look like an environment
variable expansion under unix.
the syntax is a hybrid of printf format specifiers and braced unix
variable expansions.

instead of being os-agnostic, interpret the os-native expansion style,
so it is consistent with proper (shell) command lines.

don't interpret quotes, as this function is meant for expanding isolated
filepaths, where nobody would expect quoting. instead, use the windows
style of simply not doing an expansion if a referenced variable is not
found, which should be good enough - it's rather unlikely that something
which happens to be an expansion of an existing variable is actually not
meant to be one.

(Instead of the initial system environment.)

Reviewed-by: kh1

(In QtCreator the wizard would take care of that.)

To keep the breakpoint state machinery simple

Task-number: QTCREATORBUG-2924
Reviewed-by: ck

Task-number: QTCREATORBUG-3090
Reviewed-by: ck

A full evaluate() call resolves the property and continues to the
underlying type. If we use Evaluate::reference() instead, we only the
first step is done and we can get at the source location if a
ASTPropertyReference is returned.

Reviewed-by: Erik Verbruggen

Task-number: QTCREATORBUG-2607
Reviewed-by: Erik Verbruggen

Reviewed-by: con

Reviewed-by: hjk
Task-number: QTCREATORBUG-3099

Clear controls that are not applicable to type, but save
and restore their value once the type is again choosen.

Remove BreakHandler::hasPendingBreakpoints, handle new types
in CDB and gdb. Start fixing Breakpoint-Dialog.
Add assignment of Breakpointresponse from BreakpointParameters.

Reviewed-by: hjk

The fixed size buttons were too big on Mac.

Task-number: QTCREATORBUG-3098
Reviewed-by: Jens Bache-Wiig