keyword and readme fix

README.md

 # b-eventb-language-extension README
 
-Compiler support for b/eventb via ProB. You need a build a version of ProB downloaded to use fully use this extension. Visit https://www3.hhu.de/stups/prob/ to get the latest version.
+Compiler support for b/eventb via ProB. You need a nightly build of ProB to fully use this extension. Visit https://www3.hhu.de/stups/prob/ to get the latest version.
 
 
 ## Features
@@ -38,3 +38,8 @@ This extension contributes the following settings:
 ### 0.0.2
 
 - Added option to set ProB path
+
+
+### 0.0.3
+
+- README fix
\ No newline at end of file

package.json

@@ -17,10 +17,10 @@
 		"Programming Languages"
 	],
 	"keywords": [
-		"multi-root ready"
+		"multi-root ready", "B", "eventB", "proB"
 	],
 	"activationEvents": [
-		"onLanguage:plaintext"
+		"onLanguage:B", "onLanguage:eventB"
 	],
 	"main": "./client/out/extension",
 	"contributes": {