Merge tag 'v1.2'

[maven-release-plugin]  copy for tag v1.2
Support onLongClick listener on Attacher

Simple change to support the onLongPress/onLongClick listener that is
used for normal Views.
add support for long press listener on PhotoAttacher
Merge branch 'master' into dev

Conflicts:
	library/src/uk/co/senab/photoview/PhotoViewAttacher.java
avoid NPE when scaletype is called in constructor of ImageView
delegate onlongclicklistener to attacher
Remove log spamming without changing source (hardcoded DEBUG flag) and
without using Proguard to remove the log entries.

Both of these techniques will still work, if desired.
Merge pull request #26 from tbsandee/dev

Support long-press listener in Attacher