Adds new icons.

Adds new icons.

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# On branch master
# Your branch is ahead of 'origin/master' by 2 commits.
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# Changes to be committed:
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#	new file:   giterdone/resources/giterdone-add.svg
#	new file:   giterdone/resources/giterdone-commit.svg
#	new file:   giterdone/resources/giterdone-diff.svg
#	new file:   giterdone/resources/giterdone-fetch.svg
#	new file:   giterdone/resources/giterdone-push.svg
#	new file:   giterdone/resources/giterdone-reset.svg
#