added update button which takes tool from text area and adds to tool ui.
Merge branch 'tool-editor' of https://github.com/p-gintare/chipster into tool-editor

Conflicts:
	src/main/web/tool-editor/src/fi/csc/chipster/web/model/BasicModel.java
	src/main/web/tool-editor/src/fi/csc/chipster/web/model/Input.java
	src/main/web/tool-editor/src/fi/csc/chipster/web/model/Output.java
	src/main/web/tool-editor/src/fi/csc/chipster/web/model/Parameter.java
	src/main/web/tool-editor/src/fi/csc/chipster/web/model/Tool.java
	src/main/web/tool-editor/src/fi/csc/chipster/web/tooledit/TextEditor.java
	src/main/web/tool-editor/src/fi/csc/chipster/web/tooledit/ToolEditor.java