Initial prototype WIP
Visually seperate external imports
Refactor var declaration
Handle errors
NewAssetDirective() does not currently need to return an error
Refactor regular expressions
NewInputManifest() does not currently need to return an error
Minimize copying of []byte to string
Ensure we close the file descriptor
Refactor a few variable names
Reduce excess whitespace
Handle error for file.Walk()
Update error handling in constructor fns
Fix error handling
Improve error handling
Handle scanner error
Add package prefix to error
Refactor error handling
Refactor error handling
Don't parse directives when scanning