updated build tool
updated library name for gradle/maven
don't send touch events while image is being updated
Merge remote-tracking branch 'upstream/master'

Conflicts:
	build.gradle
	demo/build.gradle
	gradle/wrapper/gradle-wrapper.properties
	library/build.gradle
	library/src/it/sephiroth/android/library/imagezoom/ImageViewTouch.java
	library/src/it/sephiroth/android/library/imagezoom/ImageViewTouchBase.java
 reapply changes from original fork for modifying zoom direction
Merge pull request #1 from solcott/master

merge changes from upstream, re-add zoom modification and remove volley