Add directory-level macros

• Add directory-level macros
• Update dependencies for security-fixes

Add getFlavor macro

• Add getFlavor macro
• Fix the unmet dependency warnings on installing the library

Update readme

• Update readme
• Update description key in package.json

Add extensions support

• Add all extensions support
• Update readme

0.1.0

• Add the basic working version where the macro replacement occurs
• Add some basic tests
• Add the example app