Update introduction.rst

In order to have coloring for this block too :)
Imagick alpha channel rounding removed
Skipped gmagick alpha channel tests
Merge pull request #341 from PunKeel/patch-1

Update introduction.rst
Add given coordinates to Point exception to ease debugging.
Fix array_merge in AbstractMetadataReader when file is not local

The parentheses were wrong for this case, leaving out the metadata
for non local files
Merge pull request #381 from javaguirre/metadata-fix

Fix array_merge in AbstractMetadataReader when file is not local
Fix image magick URL
Merge pull request #382 from romainneutron/fix-build

Fix imagemagick URL
Make the extension installation fail when any statement fails

This gives a much better feedback when there is an error in the installation
Merge pull request #383 from stof/patch-1

Make the extension installation fail when any statement fails
Add Jpg logo for tests purposes
Add exif data for test purposes
Add tests for #381
Add test coverign #380 case
Merge pull request #385 from romainneutron/fix-381

Add tests for #381
Merge pull request #386 from romainneutron/fix-380

Add test covering #380 case
Fix #370: Update ImageInterface docblocks
Merge pull request #388 from romainneutron/docblocks

Fix #370: Update ImageInterface docblocks
Switch protected profile property to private