Cleaned-up Singleton class

* Revised the singleton class, removing unnecessary code and changing others.
* Added an extra level of detail to the version numbers used (from x.y to x.y.z)

Minor cleaning

* Removed unnecessary `using`s
* Now using `(object) x == null` for better performance
* Other random and minor updates

Fixed PoolExtension bug (wrong method was called)

Minor updates to Localization and some extensions

* ApplicationHelper now uses WSAPlayer instead of MetroPlayer for Unity 5
* Localization now takes into account the writing style of the language (LTR, RTL).
* LocalizedText now has a function to change its custom language.
* Added extension to reverse strings.

Updated Pools

* Spawned GameObjects can now have their Transform values resetted to their blueprint's
* GameObjects can now be Spawned without specifying a position
* Pool Manager's Clear() can now destroy its child objects

Added Localization module

Namespace deleted and attribute added

* Unitilities.Extras namespace deleted, it's now all in Unitilities.
* Added [ReadOnly] Attribute

Preparing for v1.0.0

* Added namespaces to facilitate integration with other plugins.
   * Unitilities: for basic stuff. Located under /Core.
   * Unitilities.Colors
   * Unitilities.Tuples
   * Unitilities.Pools
   * Unitilities.Debugging
   * Unitilities.EditorStuff
   * Unitilities.Timers
* Changed several scripts, mainly those related to the HSVColor.
* Added initial commentaries to each script.

Updated to Unity 5.0

Perpendicular function updated

* Added an alternate perpendicular function. One goes CW, the other CCW.
* Expanded the Vector methods to quickly convert between V2, V3 & V4.