Portal Highlighter - Infrastructure

Issue #435
added guard for API17 TextView method setCompoundDrawablesRelativeWithIntrinsicBounds
Mod Portal Highlighter: Multiples and none

Issue #400
Merge pull request #451 from vita10gy/infrastructure

Portal Highlighter - Infrastructure
Merge pull request #452 from vita10gy/mod_highlighters

Mod Portal Highlighter: Multiples and none
Use function available on older APIs instead of API detection