CONTRIBUTING: split out guidelines from README

To shorten the README provide a nowadays "well-known" CONTRIBUTING file
where the contribtion guidelines for meta-java are described.

Signed-off-by: Richard Leitner <richard.leitner@skidata.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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+meta-java contribution guidelines
+=================================
+
+Contributing via GitLab.com
+---------------------------
+
+To contribute to this layer you may fork the repository and create a merge
+request at https://gitlab.com/meta-java/meta-java.
+
+Please refer to: https://docs.gitlab.com/ee/user/project/merge_requests/
+for more information on merge requests in GitLab.
+
+Contributing via E-Mail
+-----------------------
+
+To contribute to this layer you may submit the patches for review to the
+mailing list (openembedded-devel@lists.openembedded.org).
+
+Please refer to:
+https://wiki.yoctoproject.org/wiki/Contribution_Guidelines#General_Information
+
+for some useful guidelines to be followed when submitting patches.
+
+Mailing list:
+
+    http://lists.openembedded.org/mailman/listinfo/openembedded-devel
+
+Source code:
+
+    git://git.yoctoproject.org/meta-java
+    http://git.yoctoproject.org/git/meta-java
+
+When creating single patches, please use something like:
+
+    git format-patch -M -s --subject-prefix='meta-java][PATCH' -1
+
+When creating a patch series, please add a cover letter describing it shortly.
+Therefore use something like:
+
+    git format-patch -M -s --cover-letter --subject-prefix='meta-java][PATCH' origin
+
+When sending patches, please use something like:
+
+    git send-email --to openembedded-devel@lists.openembedded.org <generated patch(es)>
+
+Please add the main layer maintainers to CC:
+
+  Henning Heinold <henning@itconsulting-heinold.de>
+  Otavio Salvador <otavio@ossystems.com.br>
+  Richard Leitner <richard.leitner@skidata.com>