Removed external link to png asset
Add missing test files
Added test case to make sure the splitCssIfIeLimitReached transform keeps relations to assets after splitting CSS
Fix: splitCssIfIeLimitreached transform should remember to populte the newly created Css Assets so relations to referenced files are kept. Closes One-com/assetgraph-builder/#107
Improved tests
Improve splitCssIfIeLimitIsReached transform. Relates to One-com/assetgraph-builder#107
splitCssIfIeLimitIsReached: Renamed test so it's the same as the transform name.
splitCssIfIeLimitIsReached transform: Made the set of Css assets to process and the max number of rules per stylesheets configurable.
splitCssIfIeLimitIsReached: Fixed off-by-one error.
splitCssIfIeLimitIsReached: Inline the new incoming relations if the replacement asset is inline.

It will be if the original asset is.
splitCssIfIeLimitIsReached: Also count selectors inside @media rules when determining where to split.
Merge branch 'splitcss'
Release 1.6.0beta29.