Amalgamate v0.1.41

• Update for Splice, Magazine interface changes.
• Upgrade riffle to 2.0.0-alpha.60.
• Upgrade magazine to 6.0.0-alpha.6.
• Upgrade turnstile to 6.0.0-alpha.55.
• Upgrade destructible to 7.0.0-alpha.45.
• Upgrade reciprocate to 0.0.6.
• Upgrade splice to 3.0.0-alpha.44.
• Upgrade writeahead to 0.0.19.
• Upgrade homogenize to 2.0.0-alpha.16.
• Upgrade b-tree to 2.0.0-alpha.84.
• Upgrade operation to 6.0.0-alpha.5.
• Upgrade skip to 0.2.24.

Closes #210.