FailBochs build process reversed

The FailBochs client is not linked by the Bochs build system anymore, but
by our cmake scripts (make fail-client):
 -  All Bochs libraries are merged into libfailbochs.a (a new target
    within the Bochs Autotools scripts).
 -  The previous libfail.a is *not* a merge of all Fail* libraries anymore,
    but pulls these in via library dependencies.

Additionally I did a lot of build system cleanup, e.g. additional external
libraries may now be pulled in where they're needed.

git-svn-id: https://www4.informatik.uni-erlangen.de/i4svn/danceos/trunk/devel/fail@1390 8c4709b5-6ec9-48aa-a5cd-a96041d1645a

src/core/comm/FailControlMessage.proto

@@ -0,0 +1,16 @@
+message FailControlMessage {
+  enum Command {
+    // Minions may send these:
+    NEED_WORK = 0;	// server replies with WORK_FOLLOWS or DIE
+    RESULT_FOLLOWS = 1;	// followed by experiment-specific ExperimentData message (holding both original parameters and experiment result)
+
+    // JobServer may send these:
+    WORK_FOLLOWS = 5;	// followed by experiment-specific ExperimentData message
+    COME_AGAIN = 6;	// no experiment-specific ExperimentData at the moment, but Campaign is not over yet
+    DIE = 7;		// tells the client to terminate
+  }
+
+  required Command command = 1;
+  optional uint32 workloadID = 2;
+  required uint64 build_id = 3;	// identifying the client/server build (e.g., build time in unixtime format)
+}