Implemented reload index for a specific city

*Implemented -r option with city code parameter
* Removed city fetch loop at the end of the file
Avoid setting options flags when not required

* Not setting at all the options flags that are not explicitly specified
  on the command prompt.
Implemented list city cinemas

* Implemented city cinema listing
* Minor refactoring on comments and line spacing
Merge branch 'argument_handling' of github.com:ccolorado/cinepolis_scraper into argument_handling

Conflicts:
	cinepolis_scraper.rb