Smoothed out the forceGenerate logic and added updateProgressBar method

### ForceGenerate() Smoothed
Before, if you did not generate all of the required mouse movements/seed points before a time limit, the seeder would simply create two more seed points and consider it done. This means that addresses could be generated with as few as 2 seeds added to the pool.

#### Before
```js
forceGenerate: function () {
				// if the mouse has not moved enough
				if (ninja.seeder.seedCount < ninja.seeder.seedLimit) {
					SecureRandom.seedTime();
					ninja.seeder.seedCount = ninja.seeder.seedLimit - 1;
					ninja.seeder.seed();
				}
			}
```

With the new logic, a random time interval (between 10 and 30 milliseconds) is generated and then creates a timer ```ninja.seeder.timer``` to generate new seeds via the ```ninja.seeder.forceGenerateLoop()``` method.

The ```forceGenerateLoop()``` method then adds new seeds on each timer iteration and updates the progress bar, rather than jumping from 0% to 100% in 2 seeds like before; it now ensures that the generated seed count is met.

#### After
```js
forceGenerate: function () {
	// if the mouse has not moved enough
	if (ninja.seeder.seedCount < ninja.seeder.seedLimit) {
		var randomTimeInterval = 10 + Math.floor(Math.random() * 20);
		ninja.seeder.timer = setInterval("ninja.seeder.forceGenerateLoop()", randomTimeInterval);
	}
},

// Force generating seeds on a timer if the user has not provided enough
// mouse movements
forceGenerateLoop: function() {

	ninja.seeder.seed();
	ninja.seeder.updateProgressBar();

	// Stop if enough seeds have been generated
	if (ninja.seeder.seedCount >= ninja.seeder.seedLimit) {
		clearInterval(ninja.seeder.timer);
	}
}
```

#### Issues / Future Improvements
* A more secure/random seed source could be utilized by the ```ninja.seeder.seed()``` method instead of using the current time.
* The timer could be randomized on each iteration so that the time seeds are not incremented evenly on each new iteration.

---

### UpdateProgressBar() Method
Tidied this up a little to be in its own function, rather than spaghetti code.