Align Option; Improved ETA calculation

• Added: align option to change the position of the progress bar (left, center, right) - thanks to sidneys on GitHub #22
• Changed: ETA value of type Infinity is displayed as INF, NaN as NULL - feature requested by AxelTerizaki on GitHub #21
• Changed: Limited the maximum ETA value to 100000s (INF is displayed in this case)
• Changed: ETA calculation moved to own scope
• Bugfix: example example-notty.php was broken