Add information in README about discontinuation of project

[szadam]

// Preview: https://github.com/szadam/pmemstream/blob/master/README.md#discontinuation-of-the-project

This change is 

[codecov-commenter]

Codecov Report

Merging #283 (890b56c) into master (ad4b618) will decrease coverage by 0.02%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #283      +/-   ##
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- Coverage   87.26%   87.24%   -0.02%     
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  Files           9        9              
  Lines         785      784       -1     
  Branches      144      144              
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- Hits          685      684       -1     
  Misses         63       63              
  Partials       37       37              

Flag	Coverage Δ
tests_gcc_debug_cpp17	87.24% <ø> (-0.02%)	:arrow_down:

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Impacted Files	Coverage Δ
pmemstream/src/iterator.c	91.81% <0.00%> (-0.91%)	:arrow_down:
pmemstream/src/region.c	89.06% <0.00%> (-0.09%)	:arrow_down:
pmemstream/src/libpmemstream.c	84.51% <0.00%> (+0.22%)	:arrow_up:

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[szadam]

README.md line 27 at r1 (raw file):

Previously, wlemkows (Weronika Lewandowska) wrote…

I mean: ! DISCONTINUATION... ! (capitals maybe) \- \- \- \`pmemstream\` is a logging .... \#\#Table of....

so, do you mean that I should merge this paragraph with the previous one?

[szadam]

README.md line 47 at r3 (raw file):

Previously, lukaszstolarczuk (Łukasz Stolarczuk) wrote…

1. `steel` as in Man of Steel? :stuck_out_tongue_winking_eye: 2. I'm not very fond of this sentence - you can ask questions everywhere (on Slack/pmem group/email), so "still have more questions" is not suitable here in my opinion

so just "if you have more questions you can reach..." or maybe just "You can reach out..."?

[lukaszstolarczuk]

README.md line 47 at r3 (raw file):

Previously, lukaszstolarczuk (Łukasz Stolarczuk) wrote… so just "if you have more questions you can reach..." or maybe just "You can reach out..."?

As I said, questions can be asked in several places, this is just one of them. From my point of view, the second version is better, e.g.: You can reach us out using the dedicated e-mail: ...