Merge pull request #2 from happy15/master

Bug fix (maybe) and lowering the target API level
project.properties: target android-17 (was android-7)
eclipse .project file
support library rev13
remove res/values-mdpi/strings.xml
support lib rev18 (was rev13)
rename color bg_light_blue to bg_custom_gallery

also move colors.xml out of values-mdpi/
into values/