v0.7.1

Changed

• Rewrite internal Sequence code using inlined functions to increase performance when the strand is known.

Fixed

• Nodes.copy potentially failing on empty collections after trying to allocate 0 bytes.
• TestGenes.test_write_scores failing on some machines because of float rounding issues.
• Gene.translate ignoring the unknown_residue argument value and always using "X".
• Memory leak in Pyrodigal.train cause by memory not being freed after building the GC frame plot.