Update imports on demo accordingly to the pip installation (#110)

Author: 0xthiagomartins

README.md

@@ -49,7 +49,7 @@ API
 The `analyze` function returns a dictionary with the results of the crawl.
 
 ```python
-from seoanalyzer import analyze
+from pyseoanalyzer import analyze
 
 output = analyze(site, sitemap)
 
@@ -58,7 +58,7 @@ print(output)
 
 In order to analyze heading tags (h1-h6) and other extra additional tags as well, the following options can be passed to the `analyze` function
 ```python
-from seoanalyzer import analyze
+from pyseoanalyzer import analyze
 
 output = analyze(site, sitemap, analyze_headings=True, analyze_extra_tags=True)
 
@@ -68,7 +68,7 @@ print(output)
 By default, the `analyze` function analyzes all the existing inner links as well, which might be time consuming.
 This default behaviour can be changed to analyze only the provided URL by passing the following option to the `analyze` function
 ```python
-from seoanalyzer import analyze
+from pyseoanalyzer import analyze
 
 output = analyze(site, sitemap, follow_links=False)