Preparation for removing MaemoDebugRunControl.

Reviewed-by: kh1

Doesn't do anything yet.

No difference in functionality yet.

Reviewed-by: kh1

Fixes: - react on build/ run configuration changes
       - now notices environment changes, like switching Qt versions
       - start button is now only shown if we have a valid qemu runtime
       - enabled/ disabled state works properly when loading a project

Task-number: QTCREATOR-210, QTCREATORBUG-1252, QTCREATORBUG-1082
Reviewed-by: ck

Fixes: - react on build/ run configuration changes
       - now notices environment changes, like switching Qt versions
       - start button is now only shown if we have a valid qemu runtime
       - enabled/ disabled state works properly when loading a project

Task-number: QTCREATOR-210, QTCREATORBUG-1252, QTCREATORBUG-1082
Reviewed-by: ck

It does not conceptually belong there, and several people have
asked for an interface to use the functionality in their own
plugins.

Task-number: QTCREATORBUG-1204
Reviewed-by: kh1

No functional changes for now.

Reviewed-by: kh1

Reviewed-by: ck

It will grow.

Reviewed-by: ck

Task-number: QTCREATORBUG-1073

(No actual functionality yet.)

Reviewed-by: kh1

Reduces the minimum size of the Options dialog.

Reviewed-by: kh1

Reviewed-by: kh1

File maemorunconfiguration.cpp now contains what the name indicates.

The maemorunconfiguration.cpp file contained (and still contains)
too many different classes.

Also introduced MaemoSshThread class to factor out common parts
of the runner and the deployer code.
The maemosshrunner files do not contain code anymore and will
be removed soon.

This will replace the current ssh-via-QProcess approach, which
has severe drawbacks.

Includes Maemo tool chain, run configuration, run control,
manager, etc.

Adds the DebuggerManager to the object pool. This is ugly, but
nobody came up with anything better on short notice. To be
refactored.

Co-Authored-By: kh1