Update ChangeLog + package.xml for next release.

Merge branch 'master' into phpseven

* master:
Make headers syntax be consistent.
Proper markdown for lists in README

Make headers syntax be consistent.

Proper markdown for lists in README

Fixed test for changed behaviour in 6.9.2-6 Beta

Typo.

Fix travis to 7.0

Disable pear package command, as it no longer gets installed on 7.

Added setImageChannelMask. Added Channel constants. Make default channel be 'none' for IM.

Corrected type for 'LongPixel'. it is actually a 4 byte int.

Correct test name.

Fixed speeling.

Avoid re-downloading source files when cached version is going to be used anyway.

Typo.

Explicitly use bash for invocation.

Remove duplicate var declaration.

Added ability to make build off individual ImageMagick commits to isolate problems.

Fixed exportImagePixels problems. Added test.

Added note about not supporting longlong pixel type.

Added a coverage test for getFeatures.

Updated test to enable alpha on source image. This allows the test to work on both IM6 and IM7.

Added try/catch to be able to say which bit failed.

Stop testing against very old versions of ImageMagick. No one cares or should care.

Leave Graphviz disabled. We don't use it, and it will sometimes crash older releases of ImageMagick.

Re-enable graphviz.