v0.17.1

Configurable timeouts for read/write locks.

For example, you have a high load node, which is used to get data from the blockchain. Such nodes should in any case accept signed blocks, but it can skip transactions for broadcasting, because they may come to the node in a signed block.

For more information #499

Automatically scale shared memory

There are two main goals:

1. To automate the scaling of the shared memory file. Now, you don't need to check free size of your shared memory.
2. To increase performance of accessing to data stored in shared memory file. Because in this case data are packed in near lying pages, and OS do not flush memory pages to load other memory pages with requested data

For more information #501