Fixes from webservices

To be broken down into smaller MRs as this accumulated over the last week.

• webservice fixes: @haufs
• fixes to latex report generation: @qingtian: files: cal_tools/tools.py
• add memory cell parsing to agipd lib: @haufs
• add option of using reservation in xfel-calibrate: @karnem, files: calibrate.py, settings.py