Update README.md

Author: tko22

README.md

@@ -2,9 +2,14 @@
 My implementation of a blockchain in C++ I created for fun :)
 Follows some Bitcoin design choices including using SHA-256 to hash headers and blocks, merkle trees, and mining WoS. 
 
+Includes a Command line interface that allows you to view blockchains at different indices and add new blocks.
+
 ### BlockChain Class
 Every time you want to add a block to the blockchain, you will need to provide it: 
 
+#### Private Variables: 
+- blockchain(vector<unique_ptr<Block> >): vector of smart pointers to Block objects
+
 `int index, string prevHash, string hash, string nonce, vector<string> &merkle`
 - index: index of the block
 - prevHash: hash of the previous block
@@ -13,18 +18,19 @@ Every time you want to add a block to the blockchain, you will need to provide i
 
 ### Mining
 (I made it very simple because I didn't want to spend much processing power)
+
 first two characters of the hash must be 0
-e.g. `003d9dc40cad6b414d45555e4b83045cfde74bcee6b09fb42536ca2500087fd9` works 
+- e.g. `003d9dc40cad6b414d45555e4b83045cfde74bcee6b09fb42536ca2500087fd9` works 
 
 
 ### Block 
 Hash header: index + prevHash + merkleRoot(data) + nonce
 
-##### Private Variables:
+#### Private Variables:
 - index
 - Data: vector of strings
 - previousHash
 - blockHash
 - nonce
 
-Peer-to-Peer coming soon!
+### Peer-to-Peer coming soon!