Xcoll release 0.9.11

What's Changed

• Support harmonic number-based cavity definitions in RF sweep by @gbrogginess in #190
• Added xshift option to loss map plotting to centre the plot around a different position (with auto-wrapping)

Develop Update

• Fix in blowup installation with apertures, and apply this new install logic for collimator installs as well
• Fix in loading of old lossmap JSONs

Full Changelog: v0.9.10...v0.9.11