Do not drag if we are already scaling.
Merge pull request #100 from Leland-Takamine/dev

Do not drag if we are already scaling.
Allow images to be zoomed in when double clicked.
Merge pull request #101 from laurencedawson/dev

Allow images to be zoomed in when double clicked.
ViewPager interaction fixed, Closes #98
Merge branch 'dev' of github.com:chrisbanes/PhotoView into dev
Fixes #103
Updated build configuration
Manually merged PR #116
Travis CI updated android-19 dependency
Updated platform target
Merger of #122 pull request, return draw matrix for better integration
Merge branch 'dev' of https://github.com/chrisbanes/PhotoView into dev