Fixes #7 - throw if src/base not specified
Fixes #5 - switch to readFile/writeFile only
Fixes #4 - drop log statements
Path joins for #6, test > fixture for #10, other fixes
Fixes #2, passes errors
Improve callbacks, add more tests
Improve test descriptions
Move reads
Expand on joined paths
Add note about FAQs, license
Fixes #9 - adds defaults for w/h