Adding shadow(Color, Blur, OffsetX and Y) to Text

This adds shadow effects to Text with options for the color, blur, and
offset for both x and y.

It also changes two default settings: textAlign  to "start" and style to
"normal". (Visually, the changes only appear if the browser is set to
right-to-left in its language settings.)
Fixed text bug (removed translate)

Finally fixed a bug in Text I noticed a few days ago by removing the
initial translate before the drawing of the text.

Because test is drawn using a x and y, the additional translate (unlike
sprites) frequently moves the final drawing position to incorrect
values. This is much more noticeable when drawing texts within
viewports.
Merge pull request #83 from videlais/master

Text: Fixed position bug; added shadow effects