Fixed exclude parameter when zipping whole backup.

Also fixed log roll help description.
Fix STORECMD: command not found
Merge pull request #141 from fernandoacorreia/master

Fix STORECMD: command not found
Add 'log' command, printing the current server log content to stdout.
Fix 'connected' command for Minecraft/Bukkit 1.6.2. Print each player on separate line.
Add 'playercount' command, printing the number of currently connected players.
Merge pull request #145 from jgehrcke/fix-connected

Fix 'connected' command for Minecraft/Bukkit 1.6.2.
Merge pull request #147 from jgehrcke/add-log

Add 'log' command, printing the current server log content to stdout.
Merge pull request #146 from jgehrcke/add-playercount

Add 'playercount' command, printing the number of currently connected pl...
added check for the existence of the service jar and understandable error on fail
Merge pull request #153 from marcelb/master

added check for the existence of the service jar
Fixed grep bug
Merge pull request #155 from jbondhus/master

Fixed grep bug
added variable with path to server log file
added 'config' to .gitignore
fixed braces
Avoid corrupting pid file when screen -list resturns extra lines
Merge pull request #157 from dansoap/master

Dynamic path to server log file
Merge pull request #158 from joe-mojo/master

Avoid corrupting pid file when screen -list resturns extra lines
Properly pass value of $SCREEN to as_user

Now passes the value of the variable rather than the literal '$SCREEN' to the as_user function when user requests the screen command.

(useful when this script is used to manage multiple instances for the same user in which case the screen attached would not necessarily be the one intended as the SCREEN variable was not used properly)