Merge remote-tracking branch 'origin/subprocess' into subprocess

Author: Greg Bowler

README.md

@@ -30,8 +30,8 @@ use Gt\Daemon\Pool;
 
 // Create three long-running processes:
 $pingProcess = new Process("ping google.com");
-$infiniteProcess = new Process("while true; do echo 'background...'; sleep 1; done");
-$dateProcess = new Process("watch date -d now");
+$infiniteProcess = new Process("while true; do echo 'background...'; sleep 3; done");
+$dateProcess = new Process("while true; do echo $(date -d now); sleep 2; done");
 
 // Add all three processes to a pool:
 $pool = new Pool();
@@ -54,22 +54,17 @@ while($pool->numRunning() > 0);
 Outputs something similar to:
 
 ```
-[Ping] PING google.com (172.217.169.14) 56(84) bytes of data.
-[Ping] 64 bytes from lhr25s26-in-f14.1e100.net (172.217.169.14): icmp_seq=1 ttl=54 time=27.2 ms
+[Ping] PING google.com (172.217.169.78) 56(84) bytes of data.
+[Ping] 64 bytes from lhr48s09-in-f14.1e100.net (172.217.169.78): icmp_seq=1 ttl=52 time=8.78 ms
 [Loop] background...
-[Date] Fri 5 Apr 14:34:12 BST 2019
-[Ping] 64 bytes from lhr25s26-in-f14.1e100.net (172.217.169.14): icmp_seq=2 ttl=54 time=17.7 ms
-[Loop] background...
-[Date] Fri 5 Apr 14:34:13 BST 2019
-[Ping] 64 bytes from lhr25s26-in-f14.1e100.net (172.217.169.14): icmp_seq=3 ttl=54 time=14.4 ms
-[Loop] background...
-[Date] Fri 5 Apr 14:34:14 BST 2019
-[Ping] 64 bytes from lhr25s26-in-f14.1e100.net (172.217.169.14): icmp_seq=4 ttl=54 time=24.9 ms
-[Loop] background...
-[Ping] 64 bytes from lhr25s26-in-f14.1e100.net (172.217.169.14): icmp_seq=5 ttl=54 time=13.9 ms
-[Loop] background...
-[Ping] 64 bytes from lhr25s26-in-f14.1e100.net (172.217.169.14): icmp_seq=6 ttl=54 time=15.8 ms
+[Date] Mon 19 Aug 09:58:54 BST 2019
+[Ping] 64 bytes from lhr48s09-in-f14.1e100.net (172.217.169.78): icmp_seq=2 ttl=52 time=8.75 ms
+[Ping] 64 bytes from lhr48s09-in-f14.1e100.net (172.217.169.78): icmp_seq=3 ttl=52 time=8.75 ms
+[Date] Mon 19 Aug 09:58:56 BST 2019
+[Ping] 64 bytes from lhr48s09-in-f14.1e100.net (172.217.169.78): icmp_seq=4 ttl=52 time=8.75 ms
 [Loop] background...
+[Ping] 64 bytes from lhr48s09-in-f14.1e100.net (172.217.169.78): icmp_seq=5 ttl=52 time=8.80 ms
+[Date] Mon 19 Aug 09:58:58 BST 2019
 ```
 
 Notice how the date process is only set to loop three times, and after it is complete the other two infinite processes continue to run.