fix typo; fix phrasing for software engineer job

lms/templates/static_templates/jobs.html

@@ -419,8 +419,8 @@
 
           <p><strong>Requirements:</strong></p>
           <ul>
-            <li>Expert Python Developer or familiar with dynamic development languages</li>
-            <li>Able to code front to back, including HTML, CSS, javascript, Django, Python</li>
+            <li>Real-world experience with Python or other dynamic development languages.</li>
+            <li>Able to code front to back, including HTML, CSS, Javascript, Django, Python</li>
             <li>You must be committed to an agile development practices, in Scrum or Kanban</li>
             <li>Demonstrated skills in building Service based architecture</li>
             <li>Test Driven Development</li>
@@ -452,7 +452,7 @@
         <a href="#software-engineer">Software Engineer</a>
       </nav>
       <h2>How to Apply</h2>
-      <p>E-mail your resume, coverletter and any other materials to <a href="mailto:jobs@edx.org">jobs@edx.org</a></p>
+      <p>E-mail your resume, cover letter and any other materials to <a href="mailto:jobs@edx.org">jobs@edx.org</a></p>
       <h2>Our Location</h2>
       <p>11 Cambridge Center <br>
         Cambridge, MA 02142</p>