Use child_process.spawn instead of exec

This allows better activity report by streaming output data on screen
and preventing buffer issues.
Also refactored in order to call duplicity from one place only

baas/backup-list.html

@@ -473,13 +473,13 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
                     <div class="small-4 columns">
                         <a id="remove-all-button" class="button radius right small"
                             onclick="if(check_remove_all()) {
-                           remove_all($('#remove-all').val(), false);
+                           remove_all(false);
                            $(this).hide()}">
                            <i class="fa fa-trash-o"></i>&nbsp;Remove All</a>
                     </div>
                     <div class="small-4 columns hide" id="force-delete">
                        <a id="remove-all-button-force" class="button radius right small alert"
-                           onclick="if(check_remove_all()) remove_all($('#remove-all').val(), true)">
+                           onclick="if(check_remove_all()) remove_all(true)">
                            <i class="fa fa-trash-o"></i>&nbsp;Force Delete</a>
                     </div>
                 </div>

baas/config.js

@@ -19,6 +19,7 @@ var mkdirp = require("mkdirp");
 var exec = require('child_process').exec;
 var execFileSync = require('child_process').execFileSync;
 var execFile = require('child_process').execFile;
+var spawn = require('child_process').spawn;
 
 var BAAS_HOME_DIR = '.baas';
 var CLOUDS_CONF_FILE = 'clouds.rc';

baas/static/stylesheets/custom.css

@@ -88,6 +88,8 @@ body legend, .template-list-title {
 #msg, #cleanup-msg {
     word-break: break-word;
     margin-right: 15px;
+    overflow: auto;
+    max-height: 200px;
 }
 .dir-field {
     overflow-x: auto;

baas/timeview.js

@@ -177,7 +177,7 @@ function load_timeview() {
     function puts(error, stdout, stderr) {
         $("#loader").hide();
         toggle_error(error, stderr);
-        if(!error) {
+        if(!parse_cloud_error(stderr) && !error) {
             var datetime_reg = /\d{4}-\d{2}-\d{2}.\d{2}:\d{2}:\d{2}\s+\d+/g;
             var dates = stdout.match(datetime_reg);
             var dates_list = "";