Unittest - Enhanced support for testing hooks (wip)

* It is now possible to test:
  * Hook Input/Output on STDIN/STDOUT channels
  * Exit code of hook script
  * Execution count (how many times the hook was executed)
  * Timestamp execution (when was the hook executed - milisec resolution)

test/test_hooks/on-add.dummy

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+echo "on-add executed"
+
+while read TASK; do
+    echo "New task $TASK"
+    echo $TASK
+done
+
+exit 0

test/test_hooks/on-exit.dummy

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+echo "on-exit executed"
+
+while read TASK; do
+    echo "New/modified task $TASK"
+done
+
+exit 0

test/test_hooks/on-launch.dummy

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+echo "on-launch executed"
+
+exit 0

test/test_hooks/on-modify.dummy

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+echo "on-modify executed"
+
+while read TASK MODTASK; do
+    echo "Existing task $TASK modified to $MODTASK"
+    echo $MODTASK
+done
+
+exit 0

test/test_hooks/wrapper.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+SELF=$(basename $0)
+ORIGINALHOOK="$(dirname $0)/original_${SELF}"
+IN="${NEWFILE}.log.in"
+OUT="${NEWFILE}.log.out"
+
+# Let it know that we were executed
+echo "% Called at $(date +%s%N)" >> ${OUT}
+
+$ORIGINALHOOK < <(tee -a ${IN}) > >(tee -a ${OUT})
+
+EXITCODE=$?
+echo "! Exit code: ${EXITCODE}" >> ${OUT}
+
+exit $EXITCODE