Add support for FS-UAE *.uaem meta-data files

[dschwen]

It would be super cool if the pack (and possibly the unpack) command would process *.uaem FS-UAE meta-data files. These are short 33 byte text files

----rwed 2018-01-26 20:56:19.52

with permission and modification timestamp data. This is similar to what the *.xdfmeta database entries look like:

[...]
AMOS_Pro/AMOSPro:rwed,03.07.2019 14:29:26 t00,
AMOS_Pro/AMOSPro.info:rwed,03.07.2019 14:29:27 t00,
AMOS_Pro/APSystem:rwed,03.07.2019 14:29:28 t00,
[...]

[dschwen]

Currently the *.uaem files are added to the hdf files, and I get errors like:

> ~/Programs/amitools/bin/xdftool workbench2.hdf pack Minimal\ Workbench\ v3.1 size=128Mi
'pack Minimal Workbench v3.1 size=128Mi' FSError: Invalid File Name(9):node=ADFSDir:'AMOS_Pro/Productivity2/Procedures/Fractals'(@142309),file_name=_OLSys_Plant_Fractals.AMOS.uaem

(which I can avoid by deleting all *.uaem files before running xdftool pack).

[dschwen]

Ah, right _OLSys_Plant_Fractals.AMOS.uaem has 31 characters...

[cnvogelg]

adding .uaem support is a very useful extension. I already missed that one a couple of time. I'll implement it now :)

[cnvogelg]

added in 2c29205.
simply add new option fsuae to an unpack command.
pack automatically detects and uses the .uaem files.