fix typos in zero_to_dapp. Resolves #490

_develop/zero_to_dapp_2.md

@@ -282,7 +282,7 @@ of the key packages `npm` installs for you is the Blockstack Javascript library.
    Kingdom application. Once the code is packaged, the DApp opens Animal Kingdom
    running at the `http://localhost:3000` URL in your browser.
 
-2. From the initial Animal Kingdom screen, choose an animal person and a territory.
+2. From the initial Animal Kingdom screen, choose an animal persona and a territory.
 
    <img src="images/initialkingdom.png" alt="">
 

_develop/zero_to_dapp_2_win.md

@@ -297,7 +297,7 @@ of the key packages `npm` installs for you is the Blockstack Javascript library.
 
    {% include note.html content="Your firewall may warn you about the application requesting internet access, you must allow this access to proceed." %}
 
-2. From the initial Animal Kingdom screen, choose an animal person and a territory.
+2. From the initial Animal Kingdom screen, choose an animal persona and a territory.
 
    <img src="images/initialkingdom.png" alt="">
 

_includes/intro-appmining.md

@@ -2,4 +2,4 @@ Traditionally the term _mining_ in cryptocurrency refers to the process of contr
 
 ![](images/mining-image.png)
 
-Blockstack believes app mining represents a revolution in app funding, allowing small teams to bootstrap without advertising or venture capital. Each month, qualifying apps compete for funding. Qualified apps are evaluated and ranked by expert app reviewers. The better your app, the higher payout you earn.</p> <p>App mining is a new mining model that is continuously evolving and improving based on <a href='https://github.com/blockstack/app-mining' target='_blank'>community feedback</a>.
+Blockstack believes app mining represents a revolution in app funding, allowing small teams to bootstrap without advertising or venture capital. Each month, qualifying apps compete for funding. Qualified apps are evaluated and ranked by expert app reviewers. The better your app, the higher payout you earn. App mining is a new mining model that is continuously evolving and improving based on <a href='https://github.com/blockstack/app-mining' target='_blank'>community feedback</a>.