Added HangDetectorPropertyTask to the PropertyTask tests.

I want to add some tests that currently fail to detect a circular
reference, but running these tests (obviously) causes PHPUnit to
hang which is very unpleasant.

HangDetectorPropertyTask extends PropertyTask and uses a custom
HangDetectorProperties (extends Properties) that counts the number
of accesses. More than 100 is interpreted as an undetected circular
reference. Don't use big property sets when testing...
Changed test3 to testCircularReferenceDetection and added data provider.
Add two new PropertyTask tests where circular definition detection fails.

Below, A->B means resolves to B in some way, like A=xx${B}yy

Currently a chain like A->B->A will be detected in the
resolveAllProperties() function since we check each new property in the
chain against the property were trying to resolve.

This fails if we start to resolve A but the circular chain doesn't
involve A:
A->B->C->B->C->B....

These two tests reflect that.
For consistence, it's circular "Definition", not "Reference".
Fix for the tests testCircularDefinition1 and testCircularDefinition2.

In resolveAllProperties() we remember which properties from $props have
been used to resolve the current property. If the same property appears
twice, we have a circular property definition.

This will detect chains like A resolves to B resolves to C resolves to B...
Forgot to add file...
detect rsync remote connection using colon
This is a quickfix on DbDeployTask where in rare cases, there's not a newline at the end of last delta.

This creates a statement like the following example:

    -- //UPDATE changelog

So the last deltaset prevents the query to update changelog table to finalise the process.
Merge pull request #289 from DragonBe/dbdeploy-quickfix

Quickfix on DbDeployTask for final update change log table
update docs
fix typo
added some tests
#1108 fix for pdosqlexec doesn't throw exception

Fix for pdosqlexec doesn't throw exception for the non-first SQL instruction.

http://www.phing.info/trac/ticket/1108

When pdosqlexec task process a dbdeploy file and we have a wrong SQL instruction but not the first instruction, PDO doesn't throw exception as explained in this bug ​https://bugs.php.net/bug.php?id=61613

To skip this bug, we can split the SQL file for a instruction for each delimiter.

Adding this control in DummyPDOQuerySplitter it works like a charm, the MySQL errors are showed.
Merge pull request #288 from splinter89/fix-rsync-remote-detection

Detect rsync remote connection using colon
Merge pull request #290 from corretge/patch-1

Fixes #1108 - fix for pdosqlexec doesn't throw exception
Merge pull request #249 from HuffAndPuff/fix-resolvehang

Fix for undetected circular definitions when resolving properties.