fix typo

contributing.md

@@ -2,7 +2,7 @@
 
 > English below.
 
-## Pull requsetの著作権について
+## Pull requestの著作権について
 
 Pull requestをすることはその変化分のコードの著作権をMAISIN&CO.に譲渡することに同意することになります。
 

docs/build.md

@@ -4,7 +4,7 @@ You must use Node LTS v4.\*.\* to build Boostnote.
 
 ## Development
 
-We use Webpack HMR to develope Boostnote.
+We use Webpack HMR to develop Boostnote.
 You can use this command to use our configuration
 
 ```
@@ -21,14 +21,14 @@ Then, we have to run the app.
 ```
 npm run hot
 ```
-> Actually the app can be start with `npm start@. However, the app will use the compiled scpript.
+> Actually the app can be start with `npm start@. However, the app will use the compiled script.
 
 By this, webpack will watch the code changes and apply it automatically.
 
 > ### Notice
 > There are some cases you have to refresh app yourself.
 > 1. When editing constructor method of a component
-> 2. When adding a new css class(same to 1: CSS classs is re-written by each component. This process occurs at Constructor method.)
+> 2. When adding a new css class(same to 1: CSS class is re-written by each component. This process occurs at Constructor method.)
 
 ## Deploy
 
@@ -41,6 +41,6 @@ So, we prepare a script which just make an excutable file.
 grunt pre-build
 ```
 
-You will find the excutable from `dist`. In this case, auto updater won't work because the app isn't signed.
+You will find the executable from `dist`. In this case, auto updater won't work because the app isn't signed.
 
 If you are necessary, you can do codesign or authenticode by this excutable.

readme.md

@@ -10,7 +10,7 @@ You can use the issue tracker of this repository for
 - reporting a bug of Boostnote
 - wanting to contribute Boostnote
 
-We have a slack if you want to ingage us deeply, ask @rokt33r to join.
+We have a slack if you want to engage us deeply, ask @rokt33r to join.
 
 - [日本語](./readme-ja.md)
 - [한국어](./readme-ko.md)