.travis.yml: Add to repository

This change makes it possible to tell Travis CI to trigger a build after
every push and every time a new merge request is submitted.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>

ci/build.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+./autogen.sh &&
+    ./configure --enable-manpages --enable-test-tool --enable-tests \
+		--enable-examples &&
+    make &&
+    sudo make install