Update VE core submodule to master (03975f8)

New changes:
a28e085 Restore QUnit web UI
8e2477c [BREAKING CHANGE] Move modules to src and tests and i18n, UnicodeJS to lib
26adfaf Fix path prefix for tests/index.html so it actually runs
d87dab5 Work around getSystemPlatform() race condition
6682ebc Make getParsedMessage() test actually test getParsedMessage()

Local changes:
* Update paths from lib/ve/modules/ve to lib/ve/src or lib/ve/tests
* Update paths from lib/ve/modules/unicodejs to lib/ve/lib/unicodesjs
* Rename unicodejs.wordbreak module to unicodejs
* Update code for getSystemPlatform() and isInternetExplorer()
  being made static

Change-Id: I7bb3bb74addfd3fbb64795c5ac3ff791b8874a4f