xprop: refacturing

[René]

I redeveloped `xprop.., so it fits my expectations:
- the tool does not allocate 1MB every time
- no limit for buffer
- refacturing the code
- colorized output
--raw param for scripts
- bug fixing
- $@ tag for pro name
$# tag for prop type
$^^ tag for separator
- no need to use `sed for paring the output e.g. I just use --dformat (def.
format)=$8s:$0 --raw for getting string prop. or --dformat=8s:$^:^$0+ for
the list
- double --args with =
- src is split to more files
- no exit fn call
- memory releasing at the end

please note it's not small patch so I don't know how to upload the files to
git. who is managing the src code let me know
Rene
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