Inline styles + @import support

Commits:

• fix error when referencing a css file directly (#27) 5562fcb
• Improve tests and coverage of extracting (#25) 776e315
• add another note about inline styles 796c88a
• Add note about inline styling 4763493
• add support for fetching inline styles (#23) c46a9df
• add support for fetching @import rules (#22) 86dcd8c
• improve test file structure (#21) 8d70f62
• fixes incorrect explanation in readme 8daed2f
• Fix unit test for CSS-in-JS (#19) 04758f1

Commit Range:
v2.0.0...master