themes.xml: Improve control visibility in dark theme
values-zh/strings.xml: Update Chinese (Simplified) translation
.gitignore: OCD fixes :)
values-zh/strings.xml: "Above", not "At the top of"
values-zh/strings.xml: "Open" -> "Close", "Drawer navigation" -> "Navigation drawer"
Merge pull request #178 from zhaofengli/master

UI tweak + Chinese translation update
use the jsoup library by gradle dependency
fix possible crashes
add eye icon again instead of the envelop one
remove card views to follow material design guidelines
add tip to the bottom of the list
improve tip sentence
improve tip display
better settings icon
use new android studio project structure
project file update
fix possible crashes
small code improvements
fix typo
improve cache file deletion management