Fixed Widget overloaded ctor.
Introduced SpriteWidget (quick&dirty, wip).

All widgets now derive from SpriteWidget.
Removed SpriteWidget sf::Sprite inheritange.

SpriteWidget is now a wrapper around an sf::Sprite.
Removed Button::getSize().

This is now managed by the Widget class.
Outsourced SpriteWidget implementation to spritewidget.cpp.
Created namelessgui::Label widget.
IngameWindow now uses new namelessgui::Label class.
DeployWindow now uses new namelessgui::Label class.
Fixed indention in gui/ng/button.hpp.
Removed unused namelessgui::Button::getText().
Moved source of namelessgui::Label to COMMON_SOURCE.
namelessgui::Button now uses new Label class.
Removed commented code from button.hpp.
namelessgui::Button ctor sets label correctly.
Merge pull request #58 from namelessvoid/namelessgui-label

Implemented custom Label class for namelessgui and did some fixing.

Closes #45.