Fix for url loading of images in ofImage::loadImage

Re discussion in #3304, ofImage::loadImage did not work on https.
Switched from using a substring check for "http" in the filename to
using Poco::URI to detect http or https in the scheme.
Updaing changelog
"Bug fix" for regex example

The order of attributes on the table tag in the HTML returned from
google has changed slightly.  width now comes before style.  Tested
in 0.8.4 and in master on win codeblocks 12.11.
update PG to latest commit
As per @kylemcdonald's suggestion, regex is attribute order-independent
Merge pull request #3310 from mikewesthad/bug-fix-regex-example

"Bug fix" for regex example
Merge pull request #3308 from mikewesthad/bugfix-loadImage-HTTPS

Fix for url loading of images in ofImage::loadImage
Add printf format checking to printf-style log constructors.

This improves safety by diagnosing format string mismatches under both Clang and GCC.
ofEvents: add constructors to event args. Closes #3312
Merge branch 'master' of github.com:openframeworks/openFrameworks
fix some warnings
Merge pull request #3311 from nneonneo/printf_patch

Add printf format checking to printf-style log constructors.
gl: fix GLES for new unssuported calls
Merge branch 'master' of github.com:openframeworks/openFrameworks
android: fix getPixelsRef -> getPixels
Merge branch 'master' into refactor-getPixelsRef