Merge pull request devitocodes#388 from opesci/tuto-typos

typos fix

Merge pull request devitocodes#357 from opesci/yask-integration-phase12

yask: Small fixes to make SIMD work, and tests

Merge pull request devitocodes#283 from opesci/fix-iteration-direction

Fix iteration direction

Docs: Force removal of non-commited files

Merge pull request devitocodes#248 from opesci/docs-cleanup

(Incomplete) documentation cleanup

Merge pull request devitocodes#174 from opesci/testing-acoustic-born

Travis: Add the full acoustic example to test Born operator