Replaced cpp-ethereum with Aleth

Author: halfalicious

doc/database_layout.rst

@@ -1,7 +1,7 @@
 Database Layout
 ===============
 
-cpp-ethereum uses three databases, all of them are essentially just
+Aleth uses three databases, all of them are essentially just
 key-value storages (LevelDB or RocksDB is used depending on build
 settings). Their physical disk locations are as follows:
 
@@ -13,7 +13,7 @@ settings). Their physical disk locations are as follows:
 
 where
 
-``{ETH_DATABASE_DIR}`` - base cpp-ethereum data directory
+``{ETH_DATABASE_DIR}`` - base Aleth data directory
 ``{GENESIS_HASH}`` - hex representation of first 4 bytes of genesis
 block hash (``d4e56740`` for main net, ``41941023`` for Ropsten)
 ``{DATABASE_VERSION}`` - encoded current version of the database layout