Revert "delete everything" (includes everything non-go-crypto)

This reverts commit 96a3502

docs/transactional-semantics.md

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+# Transactional Semantics
+
+In [Using Tendermint](./using-tendermint.md#broadcast-api) we
+discussed different API endpoints for sending transactions and
+differences between them.
+
+What we have not yet covered is transactional semantics.
+
+When you send a transaction using one of the available methods, it first
+goes to the mempool. Currently, it does not provide strong guarantees
+like "if the transaction were accepted, it would be eventually included
+in a block (given CheckTx passes)."
+
+For instance a tx could enter the mempool, but before it can be sent to
+peers the node crashes.
+
+We are planning to provide such guarantees by using a WAL and replaying
+transactions (See
+[this issue](https://github.com/tendermint/tendermint/issues/248)), but
+it's non-trivial to do this all efficiently.
+
+The temporary solution is for clients to monitor the node and resubmit
+transaction(s) and/or send them to more nodes at once, so the
+probability of all of them crashing at the same time and losing the msg
+decreases substantially.