modified readme

README.md

@@ -11,3 +11,25 @@ What can I do with it?
 ======================
 For the moment, the plugin's user interface is very basic. You can load a config file (just like you would do with classic hru-delin) and the plugin will run the 4 steps and load/display result files.
 You can select which steps you want to run, in case you just want to run a few steps or you already have intermediate results and you want to finish the job.
+
+How to install ?
+================
+This plugins includes HRU delin v6.0 and imports it instead of executing it.
+This repository has a submodule, this means hru-delin.git repository is nested into hru-delin-qgis.git.
+Make sure you clone it like that:
+git clone --recurse-submodules --remote-submodules git@gitlab-ssh.irstea.fr:hru-delin-dev/hru-delin-qgis.git
+# or
+git clone --recurse-submodules --remote-submodules https://gitlab.irstea.fr/hru-delin-dev/hru-delin-qgis.git
+
+
+Produce a release
+Edit version.txt and put the desired version number there.
+There are 2 methods to produce a release .zip archive.
+
+Produce locally
+You can run ./version.sh and it will produce a zip file ready to be distributed.
+
+Automated release
+You can also push to build branch:
+git push origin master:build
+This will trigger a CI pipeline which will produce a release archive available in the pipeline list as an artifact.