added blockio doc for db keys

docs/dev/blockio-keys.txt

@@ -0,0 +1,6 @@
+Blockio wraps safedb, the new key value database module
+
+This is how the keys are setup and what they are for:
+
+bl-{type}: list of hashes for blocks for every stored block type
+{block hash}: block data

src/blockio/store/__init__.py

@@ -0,0 +1,26 @@
+"""Onionr - Private P2P Communication.
+
+Store blocks and cache meta info such as block type
+"""
+import safedb
+"""
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+"""
+
+
+def store_block(block_data):
+
+    # If Onionr daemon is running, we should use the client
+    # API server to store blocks, if not we can
+