Fix issues #1051 for 1.3.0
Update loader.c

Moved from pull request on master to 1.3.0
Update status.c
Update metadata.c
Updated comment for watermark
Merge pull request #1071 from xboston/patch-7

Update json.c
Add param replace for skipAttributes
If image not exists and set the width and height, then create a new image
Updated ImageTest.php
Updated ImageTest.php
Merge pull request #1069 from thecodeassassin/patch-3

Update loader.c
Merge pull request #1075 from sjinks/rvo

Return Value Optimization
Merge pull request #1070 from xboston/patch-6

Update status.c
Merge pull request #1072 from xboston/patch-8

Update metadata.c
Merge pull request #1064 from dreamsxin/issues_1051_1.3.0

Fix issues #1051 for 1.3.0
Merge pull request #1076 from dreamsxin/image_updated

Updated image function construct