.gitconfig contains filters to insert bash_unit version information

from tag.

Run the following command to activate this .gitconfig file locally on
your system :

$> git config --local include.path ../.gitconfig

Author: pgrange

.gitconfig

@@ -0,0 +1,3 @@
+[filter "insert_tag"]
+  clean = sed 's:^VERSION=.*:VERSION=snapshot:'
+  smudge = sed "s:^VERSION=.*:VERSION=$(git describe --tags --abbrev=0):"

CONTRIBUTING.md

@@ -0,0 +1,8 @@
+Be aware that bash_unit version information is extracted from git tags.
+If you need to deliver a versionned copy of bash_unit, you will have to
+activate the appropriate filters so that version information is up to
+date.
+
+To do so, run the following command on your system :
+
+$> git config --local include.path ../.gitconfig