Spelling/grammar fixes in top level markdown files

Author: Ben Gorman

CODE_OF_CONDUCT.md

@@ -2,7 +2,7 @@
 
 ## Our Pledge
 
-In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to making participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
+In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to make participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
 
 ## Our Standards
 

PLUGIN_DEV.md

@@ -1,7 +1,7 @@
 # Plugin Development 
 
-This document is not meant as complete guide for developing plugins but more as a changelog for changes in
-Grafana that can impact plugin development. When ever you as plugin author encounter an issue with your plugin after
+This document is not meant as a complete guide for developing plugins but more as a changelog for changes in
+Grafana that can impact plugin development. Whenever you as a plugin author encounter an issue with your plugin after
 upgrading Grafana please check here before creating an issue. 
 
 ## Links

README.md

@@ -19,7 +19,7 @@ If you have any problems please read the [troubleshooting guide](http://docs.gra
 Be sure to read the [getting started guide](http://docs.grafana.org/guides/gettingstarted/) and the other feature guides.
 
 ## Run from master
-If you want to build a package yourself, or contribute - Here is a guide for how to do that. You can always find
+If you want to build a package yourself, or contribute - here is a guide for how to do that. You can always find
 the latest master builds [here](https://grafana.com/grafana/download)
 
 ### Dependencies
@@ -71,7 +71,7 @@ Open grafana in your browser (default: `http://localhost:3000`) and login with a
 
 ### Building a Docker image
 
-There are two different ways to build a Grafana docker image. If you're machine is setup for Grafana development and you run linux/amd64 you can build just the image. Otherwise, there is the option to build Grafana completely within Docker.
+There are two different ways to build a Grafana docker image. If your machine is setup for Grafana development and you run linux/amd64 you can build just the image. Otherwise, there is the option to build Grafana completely within Docker.
 
 Run the image you have built using: `docker run --rm -p 3000:3000 grafana/grafana:dev`
 
@@ -90,7 +90,7 @@ Choose this option to build on platforms other than linux/amd64 and/or not have
 
 The resulting image will be tagged as `grafana/grafana:dev`
 
-Notice: If you are using Docker for MacOS, be sure to let limit of Memory bigger than 2 GiB (at docker -> Preferences -> Advanced), otherwize you may faild at `grunt build`
+Notice: If you are using Docker for MacOS, be sure to set the memory limit to be larger than 2 GiB (at docker -> Preferences -> Advanced), otherwise `grunt build` may fail.
 
 ### Dev config
 
@@ -129,8 +129,8 @@ GRAFANA_TEST_DB=postgres go test ./pkg/...
 
 ## Contribute
 
-If you have any idea for an improvement or found a bug, do not hesitate to open an issue.
-And if you have time clone this repo and submit a pull request and help me make Grafana
+If you have any ideas for improvement or have found a bug, do not hesitate to open an issue.
+And if you have time, clone this repo and submit a pull request to help me make Grafana
 the kickass metrics & devops dashboard we all dream about! 
 
 Read the [contributing](https://github.com/grafana/grafana/blob/master/CONTRIBUTING.md) guide then check the [`beginner friendly`](https://github.com/grafana/grafana/issues?q=is%3Aopen+is%3Aissue+label%3A%22beginner+friendly%22) label to find issues that are easy and that we would like help with.