implemented basic resume system (needs improvements)

init.sh

@@ -90,6 +90,11 @@ load_configuration
 
 process_commandline_and_vars
 
+# Reinit stage file if no resuming
+if [[ $RESUME != true ]]; then
+    [[ -f $STAGE_FILE ]] && rm -f $STAGE_FILE
+fi
+
 # Run prechecks
 [[ JUMP != true ]] && for mod in $MODULE_LIST; do
     . modules/$mod.sh
@@ -113,10 +118,14 @@ fi
 
 # We launch modules one after one
 for mod in $MODULE_LIST; do
+    if [[ $RESUME == true ]] && [[ $(grep $mod $STAGE_FILE) ]]; then
+        continue
+    fi
     # We need this only if JUMP is set but doesn't matter if it's done again
     . modules/$mod.sh
     version=VER_$mod
     prnt I "Application des modifications pour $mod version ${!version}..."
+    echo $mod >> $STAGE_FILE
     $mod
 done