Xtrack version 0.36.4

Changes:

• More accurate calculation of dispersion and crab dispersion
• In twiss method="4d" freezes the energy variables (but not zeta).
• Fixes in management of cached and pre-built kernels and some reorganization in Tracker.
• Fixes in twiss orientation management.
• Fix in Line.optimize_for_tracking.
• Remove to_binary/from_binary methods in Tracker.

Full Changelog: v0.36.2...v0.36.4