Added ship plugin instructions on readme

5 jobs for master in 4 minutes and 5 seconds
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Status Job ID Name Coverage
  Build
passed #142792198
dmd-build

00:01:34

passed #142792197
ldc-build

00:02:19

 
  Test
passed #142792201
dmd-unit-tests

00:01:08

passed #142792200
ldc-system-tests

00:01:09

passed #142792199
ldc-unit-tests

00:01:45