Configurable fade in and fade out durations
Customizable font sizes and shadow colors
Merge branch 'font-customization'
Merge branch 'button-positioning'

Conflicts:
	library/src/com/github/espiandev/showcaseview/ShowcaseView.java
Update build tools version & gradle path for CI
Merge https://github.com/Espiandev/ShowcaseView

Conflicts:
	library/build.gradle
	library/src/com/github/espiandev/showcaseview/ShowcaseView.java
	pom.xml
	sample/build.gradle
	sample/res/values/styles.xml
removed global version due to trouble when including through submodule