Add TLM fields to documentation and XSD schema

[bitsgalore]

See code here:

d4a7f77

[bitsgalore]

XSD schema done:

945e6e5

Still TODO:

• Documentation
• Also check tlm output: for "tika-tlm-main-header.jp2" reported ttlm values are all -9999; values should be in range 0-254 or 0-65534. Looks like a BaseException in bytesToInteger function.
• According to Table A.33, the data types of both ttlm and ptlm are a function of st and pt, respectively. This is not reflected in the code, which always unpacks both ttlm and ptlm as integers!