Updated Home (markdown)

Home.md

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 Welcome to the libiec61850 wiki!
 
 Branches:
-* v1.4: branch for latest development version
-* v1.3: branch for version 1.3.x maintenance
+* v1.5: branch for latest development version
+* v1.4: branch for version 1.4.x maintenance
+* v1.3: branch for version 1.3.x maintenance (no longer maintained)
 * v1.2: branch for version 1.2.x maintenance (no longer maintained)
 * v1.1: branch for old version 1.1.x (no longer maintained)
 * development: outdated (don't use!)