Mkdirp sync

Fixes a bug where it was building the folder path using an async command and should be done sync.

Dependency incorrect

mkdirp is a dependency

Error handling bugfix

When throwing an error, lodash.isUndefined would see null as defined and shouldn't enter the if. Also fixes a bug with when displaying error messages not to use colours (err.red) as colours only gets added to Strings.

Callback functionality

Adds functionality to have callbacks on completion of building JSON.

Closes Issue #4

Initial release of abe-json-builder

Merge pull request #3 from apibyexample/bug/recursive-create-directory

Fixes an issue where mkdir was unable to resursive create directories.