Bump version to 0.2.0
Fix Swift 1.13 compatibility

When running Swift 1.13 and enabling `splice` in the configuration,
`system_has_splice` would be called` even though it doesn't exist in
that version of Swift (1.13 has no `splice` support).

This patch works around this.
Merge pull request #24 from scality/compat-1.13

Fix Swift 1.13 compatibility
Bump version to 0.2.1
Init sproxyd conf check