Fixed test cases for sequence diagrams

Updated config to match a conversation knut and i had about the relationship between global, site, and integrator configuration
(Will update docs)
Renamed wrapEnabled to wrap
Poor man's caching for calculateTextDimensions, wrapLabel, and breakString (actually makes a huge difference)

src/config.spec.js

@@ -0,0 +1,52 @@
+/* eslint-env jasmine */
+import configApi from './config';
+
+describe('when working with site config', function() {
+  beforeEach(() => {
+    configApi.reset(configApi.defaultConfig);
+  });
+  it('should set site config and config properly', function() {
+    let config_0 = { foo: 'bar', bar: 0 };
+    configApi.setSiteConfig(config_0);
+    let config_1 = configApi.getSiteConfig();
+    let config_2 = configApi.getConfig();
+    expect(config_1.foo).toEqual(config_0.foo);
+    expect(config_1.bar).toEqual(config_0.bar);
+    expect(config_1).toEqual(config_2);
+  });
+  it('should set config and respect secure keys', function() {
+    let config_0 = { foo: 'bar', bar: 0, secure: [...configApi.defaultConfig.secure, 'bar'] };
+    configApi.setSiteConfig(config_0);
+    let config_1 = { foo: 'baf', bar: 'foo'};
+    configApi.setConfig(config_1);
+    let config_2 = configApi.getConfig();
+    expect(config_2.foo).toEqual(config_1.foo);
+    expect(config_2.bar).toEqual(0); // Should be siteConfig.bar
+  });
+  it('should set reset config properly', function() {
+    let config_0 = { foo: 'bar', bar: 0};
+    configApi.setSiteConfig(config_0);
+    let config_1 = { foo: 'baf'};
+    configApi.setConfig(config_1);
+    let config_2 = configApi.getConfig();
+    expect(config_2.foo).toEqual(config_1.foo);
+    configApi.reset();
+    let config_3 = configApi.getConfig();
+    expect(config_3.foo).toEqual(config_0.foo);
+    let config_4 = configApi.getSiteConfig();
+    expect(config_4.foo).toEqual(config_0.foo);
+  });
+  it('should set global reset config properly', function() {
+    let config_0 = { foo: 'bar', bar: 0};
+    configApi.setSiteConfig(config_0);
+    let config_1 = configApi.getSiteConfig();
+    expect(config_1.foo).toEqual(config_0.foo);
+    let config_2 = configApi.getConfig();
+    expect(config_2.foo).toEqual(config_0.foo);
+    configApi.reset(configApi.defaultConfig);
+    let config_3 = configApi.getSiteConfig();
+    expect(config_3.foo).toBeUndefined();
+    let config_4 = configApi.getConfig();
+    expect(config_4.foo).toBeUndefined();
+  });
+});