Inventory textures

As mentioned in a previous post, here's the screenshot of the textures in the inventory slots:

It demonstrates:

- textures in individual slots

- background white in slot to highlight the hovered slot

- a text wording at the mouse pointer of the item

A small fix still to do of stacking items individually, will work on that tomorrow.

Other small point also is creating the keyboard input routine for the new game menu screen, to allow the player to enter a desired world name for each new game. Also to enter a random seed for the world to use during the procedural terrain generation.

And once these 2 small additions are done, its a case of feature freeze and clean up to get this finally to a v0.1 alpha release.

Still on target for a release at the end of next week....