Bhf Hohenschönhausen: add platform edges (and ifopt ids)

Bhf Hohenschönhausen (platform 3): Convert platform way to relation (to add support for platform_edges).

Bhf Hohenschönhausen (platform 4): Convert platform way to relation (to add support for platform_edges).

Bhf Wannsee: add platform edges (and ifopt ids)

Bhf Lichterfelde Ost: add platform edges (and ifopt ids)

Bhf Lichterfelde Ost (platform 4): Convert platform way to relation (to add support for platform_edges).

Bhf Lichterfelde Ost (platform 3): Convert platform way to relation (to add support for platform_edges).

Bhf Schöneweide: add platform edges (and ifopt ids)

Bhf Schöneweide (platform 1/2): Convert platform way to relation (to add support for platform_edges).

Bhf Mahlsdorf: add platform edges (and ifopt ids)

Bhf Mahlsdorf (platform 5): Convert platform way to relation (to add support for platform_edges).

S-Bhf Biesdorf: add/fix ifopt ids

S-Bhf Schönfließ: add ifopt ids

S-Bhf Babelsberg: add ifopt ids

S-Bhf Griebnitzsee: fix IFOPT ids for platforms 1/2

Bhf Strausberg: add platform edge for platform 2, add separate IFOPT for track 8's edge on platform 2/8

S-Bhf Priesterweg: add platform edges (and ifopt ids)

S-Bhf Priesterweg (platform 2/4): Convert platform way to relation (to add support for platform_edges).

S-Bhf Priesterweg (platform 1/3): Convert platform way to relation (to add support for platform_edges).

U-Bhf Zoologischer Garten (U9): add platform edges (and ifopt ids)