Update README.md

Quick documentation fix for Aggregations paragraph's example
Merge pull request #4 from myselfhimself/patch-1

Update README.md - Aggregation snippet
Merge branch 'develop' of https://github.com/iverberk/larasearch into develop
Observer::findAffectedModels: prevent walking through empty relation records models on Observer's saved/delete events
Small formatting correction
Merge branch 'myselfhimself-develop' into develop
Allow whitespace in annotations
Merge pull request #6 from iverberk/allow_variable_whitespace_in_annotations

Allow whitespace in annotations
Add support for the FROM keywork on follow. Fix #8