Fix reminders

Without 924b724, I have :
```
10-05 17:28:47.283  31408-31408/com.hdweiss.morgand.debug D/SafeAsyncTask﹕ column 'method' is invalid
10-05 17:28:47.293  31408-31408/com.hdweiss.morgand.debug E/SafeAsyncTask﹕ safeDoInBackground() threw exception
    java.lang.IllegalArgumentException: column 'method' is invalid
            at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:167)
            at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:137)
            at android.content.ContentProviderProxy.insert(ContentProviderNative.java:468)
            at android.content.ContentResolver.insert(ContentResolver.java:1190)
            at com.hdweiss.morgand.synchronizer.calendar.CalendarWrapper.addReminder(CalendarWrapper.java:117)
            at com.hdweiss.morgand.synchronizer.calendar.CalendarWrapper.insertEntry(CalendarWrapper.java:102)
            at com.hdweiss.morgand.synchronizer.calendar.SyncCalendarTask.createOrUpdateEntry(SyncCalendarTask.java:98)
            at com.hdweiss.morgand.synchronizer.calendar.SyncCalendarTask.syncFileSchedule(SyncCalendarTask.java:80)
            at com.hdweiss.morgand.synchronizer.calendar.SyncCalendarTask.safeDoInBackground(SyncCalendarTask.java:52)
            at com.hdweiss.morgand.synchronizer.calendar.SyncCalendarTask.safeDoInBackground(SyncCalendarTask.java:22)
            at com.hdweiss.morgand.utils.SafeAsyncTask.doInBackground(SafeAsyncTask.java:56)
            at android.os.AsyncTask$2.call(AsyncTask.java:288)
            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)
```

For 434129e, check the commit message.