[IMPROVED] Consolidated imports.
Updated the README.
Merge pull request #84 from AgileBits/task/consolidate-imports

[IMPROVED] Consolidated imports.
Removed extra `}` in the README

This should resolve issue #98
Merge pull request #99 from AgileBits/task/fix-typo-in-readme

Removed extra `}` in the README
Added the import `OnePasswordExtension.h` step in the README

This should resolve issue #96.
The instruction is clearer now
Merge pull request #100 from AgileBits/task/add-import-step-in-the-readme

Added the import `OnePasswordExtension.h` step in the README
3x and PDF icons and corrected designations

Added 3x pngs and PDFs of all icons. Also changed ~ipad/iphone
designations to ~compact/regular
Merge pull request #103 from AgileBits/3x-and-vector-icons

3x and PDF icons and corrected designations