Merge pull request fatz#4 from dr4Ke/master

REPLICATION method, pnp4nagios template, small fixes and improvements

README.md

@@ -14,9 +14,8 @@ the `example.cfg` should give you an idea what to do.
 ![nagios datadomain](./img/nagios-datadomain.png)
 
 ### Todos
-An important part of the data domain is the replication. Currently check_datadomain doesn't support replications.
+An important part of the data domain is the replication. Currently check_datadomain only supports checking replication pairs state.
 
-* check all replication contexts
 * check age of last replication
 * check size of data to sync
 
@@ -56,4 +55,4 @@ You can watch for example the `PreCompBytesRemaining` for each replication conte
 ### space
 You also should measure the space usage on the DD file systems. To get an overview how many data is written to your disks and when it's time to tidy up or buying a new shelf. `dd_space-Data` is the really interesting value. You'll be able to see issues with replications here too. If a snapshot doesn't expire or isn't deleted you can see a disk usage difference (if the devices are cross replicated). In normal cases the snapshot will be expired and cleaned up when the initial replication is done.
 
-![diskUsage](./img/diskUsage.png)
+![diskUsage](./img/diskUsage.png)