doc to use the live branch

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>

diff --git a/REAME-LIVE b/REAME-LIVE
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index 0000000..05e8041
--- /dev/null
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+In order to use the (beta) live tracing features of LttngTop, you need these
+branches :
+
+git clone -b lttngtop-live git://git.dorsal.polymtl.ca/~jdesfossez/lttng-tools
+git clone -b lttngtop-live git://git.dorsal.polymtl.ca/~jdesfossez/babeltrace
+
+The only difference between these branches and the master branch is that they
+export an additional library that is used by lttngtop to do live tracing.
+
+You have to compile and install lttng-tools before babeltrace since there are
+dependencies on the library exposed by this special lttng-tools in babeltrace
+for live mmap buffer consuming.
+
+Then you can compile and use the live branch of LttngTop :
+git clone -b live git://git.lttng.org/lttngtop.git