docs: update CONTRIBUTING.md (#299)

CONTRIBUTING.md

@@ -4,7 +4,7 @@ Contributions, issues and feature requests are very welcome. If you are using th
 
 ## Guidelines
 
-If you will develop some pull request, it's very important follow these basic rules:
+If you are planning to submit a pull request, it's very important follow these basic rules:
 
 ### Commit messages
 
@@ -17,7 +17,7 @@ Commit messages should follow the [commit message convention](https://convention
 - Work in the **src** folder of respective package and **DO NOT** checkin dist in the commits.
 - It's OK - and a very nice thing - to have multiple small commits as you work on the PR - we will let GitHub automatically squash it before merging.
 
-### If adding new feature:
+### If adding a new feature:
 
 - Make sure that [all examples](https://github.com/pedronauck/docz/tree/master/examples) are running as expected
 - Provide convincing reason to add this feature. Ideally you should open a suggestion issue first and have it greenlighted before working on it.
@@ -63,7 +63,7 @@ There's a lot of [packages](https://github.com/pedronauck/docz/tree/master/packa
 - This is the core of docz. All build algorithms, server process and parses belongs to here.
 - If you break this package, probably you'll break all packages! Please, be carefull.
 - All cli commands are built here and imported on `docz` package using `./bin` script.
-- Do not create scripts that's running on browser here, just node scripts.
+- Do not create scripts that's running on browser here, only node scripts.
 
 #### **[docz](https://github.com/pedronauck/docz/tree/master/packages/docz)**
 - Main and top level package.
@@ -74,16 +74,16 @@ There's a lot of [packages](https://github.com/pedronauck/docz/tree/master/packa
 ### Watching projects
 
 To speed up your develop process:
-- Split your terminal openning the packages that you need to develop and running `yarn dev` in each window.
-- After that, use any of this splitted window to run `yarn dev` in some [example](https://github.com/pedronauck/docz/tree/master/examples) to run it, like that:
+- Split your terminal and open each package directory in a separate window.
+- Run `yarn dev` in each window to run the watch tasks. For example, in this [examples](https://github.com/pedronauck/docz/tree/master/examples) directory.
 
 ![](https://cdn-std.dprcdn.net/files/acc_649651/MdH4FL)
 
-Now you're watching `docz`, `docz-core` and `docz-theme-default` and running `docz-example-basic`. So, any modificationmade on any package will reflect on basic example on the fly!
+In the above example you're watching `docz`, `docz-core` and `docz-theme-default` and also running `docz-example-basic`. So any modifications made to any of those packages will reflect in basic example on the fly!
 
 ### Creating plugins
 
-If has some plugin that you want to create, please contact-me before to talk about the possibility to make this plugin official!
+If there are some plugin that you want to create, please contact me before to talk about the possibility to make this plugin official!
 
 ## Contributors