hacking: Add 'Development Requirements' section.

* HACKING.md ('Development Requirements'): New section.

diff --git a/HACKING.md b/HACKING.md
index 2de54adde2833ad826a44b10e60d66cd06a01463..561fa8c57770b3b8329fbabac28387a34005dcdd 100644 (file)
--- a/HACKING.md
+++ b/HACKING.md
@@ -1,5 +1,11 @@
-Commit Messages
----------------
+Development Requirements
+------------------------
+
+* [Civix](https://github.com/totten/civix)
+  Civix is a command-line tool for building CiviCRM extensions.
+
+Commit Message Guidelines
+-------------------------
 
 Follow the GNU coding standards for change log messages.  Browse the
 commit log for examples.