Make sure books are locked down when uploading

(so users who download them will be translating not authoring)
Merge pull request #82 from JohnThomson/LockDownUploads

Make sure books are locked down when uploading
BL-664: Use culture-invariant parse to compare version numbers

Prevents e.g. French culture choking on '2.0'
Merge pull request #87 from JohnThomson/InvariantParse

BL-664: Use culture-invariant parse to compare version numbers