Revert "Rename Arabidopsis_SNPs to arabidopsis_SNPs"

This reverts commit e106770ba00f093b5c6b7da28039c76efe7536be.
Revert "Revert "Rename Arabidopsis_SNPs to arabidopsis_SNPs""

This reverts commit 002e07c8ef0d003ebe35a05d0040b1e6530224f3.