Text execution improvements:

1) Tests for all operating systems can now be run with a single command.
2) Tests can be run in parallel with --process-max.
3) Container generation now integrated into test.pl
4) Some basic test documentation.

test/README.md

@@ -0,0 +1,58 @@
+# pgBackRest - Regression, Unit, & Integration Testing
+
+## Introduction
+
+pgBackRest uses Docker to run tests and generate documentation. Docker's light-weight virualization provides the a good balance between proper OS emulation and performance (especially startup)
+
+A `Vagrantfile` is provided that contains the complete configuration required to run pgBackRest tests and build documentation. If Vagrant is not suitable then the `Vagrantfile` still contains the configuration steps required to build a test system.
+
+Note that this is not required for normal operation of pgBackRest.
+
+## Testing
+
+The easiest way to start testing pgBackRest is with the included `Vagrantfile`.
+
+_Build Vagrant and Logon_:
+```
+cd test
+vagrant up
+vagrant ssh
+```
+The `vagrant up` step could take some time as a number of Docker containers must also be built. The `vagrant up` command automatically logs onto the VM.
+
+_Run All Tests_:
+```
+/backrest/test/test.pl
+```
+
+_Run Tests for a Specific OS_:
+```
+/backrest/test/test.pl --vm=co6
+```
+
+_Run Tests for a Specific OS and Module_:
+```
+/backrest/test/test.pl --vm=co6 --module=backup
+```
+
+_Run Tests for a Specific OS, Module, and Test_:
+```
+/backrest/test/test.pl --vm=co6 --module=backup --full
+```
+
+_Run Tests for a Specific OS, Module, Test, and Thread Max_:
+```
+/backrest/test/test.pl --vm=co6 --module=backup --full --thread-max=4
+```
+Note that thread-max is only applicable to the `synthetic` and `full` tests in the `backup` module.
+
+_Run Tests for a Specific OS, Module, Test, Thread Max, and Database Version_:
+```
+/backrest/test/test.pl --vm=co6 --module=backup --full --thread-max=4 --db-version=9.4
+```
+Note that db-version is only applicable to the `full` test in the `backup` module.
+
+_Iterate All Possible Test Combinations_:
+```
+/backrest/test/test.pl --dry-run
+```