Add option to hide dates from other months

+++ b/includes/fullcalendar.fullcalendar.incundefined
@@ -79,6 +79,7 @@ function fullcalendar_fullcalendar_option_definition() {
+    'displayAllDays' => array('default' => 1),

should be

'default' => TRUE,
'bool' => TRUE,

+++ b/includes/fullcalendar.fullcalendar.incundefined
@@ -226,6 +227,16 @@ function fullcalendar_fullcalendar_options_form(&$form, &$form_state, &$view) {
+    '#prefix' => '<div style="clear: both;">',
+    '#suffix' => '</div>',

Is this really necessary?

+++ b/theme/theme.incundefined
@@ -36,6 +36,10 @@ function template_preprocess_fullcalendar(&$variables) {
+  if (!$variables['options']['displayAllDays']) {

Use !empty().

In general, we're using camelCase for options defined by the plugin itself, our custom options should be not_camel_case.

+++ b/theme/theme.incundefined
@@ -36,6 +36,10 @@ function template_preprocess_fullcalendar(&$variables) {
+  if (!empty($variables['options']['display_all_days'])) {
+    $variables['element']['fullcalendar']['#attributes']['class'][] = 'fullcalendar-hide-other-month';

This should be in fullcalendar_fullcalendar_options_process() which is in includes/fullcalendar.fullcalendar.inc

Having it be "uncheck" to disable doesn't work unless we write more upgrade path code, since it will register as unchecked until the view is resaved.
So this switches it to "Check to disable".

Note, if you've installed FullCalendar Options before, you have to go to admin/config/user-interface/fullcalendar/options and check that checkbox. Writing a hook_update_N for this is probably a waste of time.

The real problem here, is that while a negative text-indent hides the number, but does not hide the events. Display:none messes things up in other ways.

Reading through http://code.google.com/p/fullcalendar/issues/detail?id=166, it seems like this can only be truly fixed in the plugin.

I think instead of exposing this, we should just add it as the default behavior for ajax-based views until #1279588: Load additional events when using ajax is fixed. Thoughts?