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...
Changed FileSyncTask to allow rsync's default behavior of creating destination directories if they don't exist
Added waitfor task to the relax ng file

unfortunate there is no entry for waitfor task inside the relax ng file. so i decided to implement one by myself. can someone please review this pr specially for the `<ZeroOrMore>` elements where i am a little bit unsure.
hope you like it and thanks in advance
Method no longer exists
Refs #1100 - add composer/phar installation instructions
Wrapping
Fixes #1106 - add .git and associated files to defaultexcludes
Update output
Update phing-grammar.rng
Merge pull request #287 from siad007/patch-1

Added waitfor task to the relax ng 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