Update README.md

Author: rouvoy

README.md

@@ -1,5 +1,5 @@
 # PowerAPI
-PowerAPI is a middleware toolkit for buidling software-defined power meters. Software-defined power meters are configurable software librairies that can estimate the power consumption of software in real-time. PowerAPI supports the acquisition of raw metrics from a wide diversity of sensors (*eg.*, physical meters, processor interfaces, hardware counters, OS counters) and the delivery of power consumptions via different channels (including filesystem, network, web, graphical). As a middleware toolkit, PowerAPI offers the capability of assemblying power meters *«à la carte»* to accomodate user requirements.
+PowerAPI is a middleware toolkit for building software-defined power meters. Software-defined power meters are configurable software libraries that can estimate the power consumption of software in real-time. PowerAPI supports the acquisition of raw metrics from a wide diversity of sensors (*eg.*, physical meters, processor interfaces, hardware counters, OS counters) and the delivery of power consumptions via different channels (including file system, network, web, graphical). As a middleware toolkit, PowerAPI offers the capability of assembling power meters *«à la carte»* to accommodate user requirements.
 
 # About
 PowerAPI is an open-source project developed by the [Spirals research group](https://team.inria.fr/spirals) (University of Lille 1 and Inria).