Fix Layout Editor Rendering of Bricks

In a recent commit to master I forgot to add the layout_height attribute
in one of the styles, disabling the rendering of brick layouts in the
Eclipse Layout Editor. This commit corrects this error.
.gitattributes file added to normalize line ending

In today's meeting it was decided that we normalize the line endings
over the course of time instead of normalizing the whole repo at once.

This *will* break git blame.
Merge pull request #145 from Catrobat/FixLayoutEditorRendering

Fix Layout Editor Rendering of Bricks
accepted
Merge pull request #146 from Catrobat/GitAttributesToNormalizeLineEndings

.gitattributes file added to normalize line endings
Introduce end-of-line normalization
Merge pull request #149 from Catrobat/NormalizeLineEndings

Introduce end-of-line normalization
Stash
Merge branch 'master' into issue#98