Add compilation test.

test-browser/compiling.js

+module.exports = {
+  'Compile Simple Contract': function (browser) {
+    browser
+      .url('http://127.0.0.1:8080')
+      // It compiles the default contract
+      .waitForElementPresent('.contract .create', 3000000)
+      // Change the text and wait for recompile
+      .clearValue('#input textarea')
+      .setValue('#input textarea', `
+      pragma solidity ^0.4.0;
+      contract TestContract { function f() returns (uint) { return 8; } }
+      `)
+      .pause(3000)
+      .assert.containsText('.contract .title', 'TestContract')
+      .click('.create .constructor .call')
+      .waitForElementPresent('.instance .call[title="f"]')
+      .click('.instance .call[title="f"]')
+      .waitForElementPresent('.output .returned')
+      .assert.containsText('.output .returned', '0x0000000000000000000000000000000000000000000000000000000000000008')
+      .assert.containsText('.output .decoded li', 'uint256: 8')
+      .end()
+  }
+}

test-browser/tests/new-file-test.js

@@ -10,7 +10,7 @@ module.exports = {
     browser
       .waitForElementVisible('.newFile', 10000)
       .click('.newFile')
-      .pause('10000')
+      .pause(500)
       .assert.containsText('.active', 'Untitled')
       .end()
   },

test-browser/tests/smoke-test.js

@@ -10,7 +10,6 @@ module.exports = {
   'Smoke test': function (browser) {
     browser
       .waitForElementVisible('#righthand-panel', 10000)
-      .pause('10000')
       .assert.containsText('#righthand-panel', 'Solidity version')
       .end()
   },