WSOTWO-123: added Google Spreadsheet connectors
Merge branch 'master' into WSOTWO-123

Conflicts:
	codenvy-ext-wso2-editor/src/main/java/com/codenvy/ide/client/State.java
	codenvy-ext-wso2-editor/src/main/java/com/codenvy/ide/client/WSO2EditorLocalizationConstant.java
	codenvy-ext-wso2-editor/src/main/java/com/codenvy/ide/client/editor/WSO2Editor.java
	codenvy-ext-wso2-editor/src/main/java/com/codenvy/ide/client/propertiespanel/connectors/twitter/GetDirectMessagesConnectorPresenter.java
	codenvy-ext-wso2-editor/src/main/java/com/codenvy/ide/client/propertiespanel/connectors/twitter/GetMentionsTimeLineConnectorPresenter.java
	codenvy-ext-wso2-editor/src/main/java/com/codenvy/ide/client/propertiespanel/connectors/twitter/GetRetweetsOfMineConnectorPresenter.java
	codenvy-ext-wso2-editor/src/main/java/com/codenvy/ide/client/propertiespanel/connectors/twitter/GetSentDirectMessagesConnectorPresenter.java
	codenvy-ext-wso2-editor/src/main/java/com/codenvy/ide/client/toolbar/ToolbarPresenter.java
	codenvy-ext-wso2-editor/src/main/java/com/codenvy/ide/client/toolbar/ToolbarView.java
	codenvy-ext-wso2-editor/src/main/java/com/codenvy/ide/client/toolbar/ToolbarViewImpl.java
	codenvy-ext-wso2-editor/src/main/java/com/codenvy/ide/client/toolbar/ToolbarViewImpl.ui.xml
	codenvy-ext-wso2-editor/src/main/resources/com/codenvy/ide/client/WSO2EditorLocalizationConstant.properties
WSOTWO-123: registered Google Spreadsheet connectors into the toolbar
Merge branch 'master' into WSOTWO-123
WSOTWO-123: remove an unused class