OnAbort Event

1. Added OnAbort event to directives.
2. Updated wiki with new features.
3. Updated Plunkr example.

OnError/OnProgress for directives

1. Added onError/onProgress handling for available directives.
2. Updated Readme/Plunkr/Wiki.
3. Updated dependencies.
4. added rxjs as a peer dependency.

Documentation Updated

Only Readme and documentation has been updated in this version.

File Reader Service

1. File Reader Service Promise Like.
2. File Reader Service Observable Like.
3. Configuration interface for directives.
4. Plunkr Updated.

File structure

1. Reorganized file structure.
2. Updated Plunkr example.
3. Renamed files.

Visibility Fix

1. Fixed Module visibility.
2. Fixed Plunkr example.

More stuff incoming....

Initial Release

1. Core infrastructure.
2. fileToBase64 directive.
3. fileToArrBuf directive.
4. fileToText directive.
5. Guidance and usage example (readme).