DOC: Use logos branch for hot-linking

README.md

@@ -11,7 +11,7 @@ based on [ggplot2](https://github.com/tidyverse/ggplot2).
 The grammar allows you to compose plots by explicitly mapping variables in a
 dataframe to the visual characteristics (position, color, size etc.) of objects that make up the plot.
 
-<img width="33%" align="right" src="https://github.com/has2k1/plotnine/blob/main/doc/images/logo-512.png?raw=true">
+<img width="33%" align="right" src="https://github.com/has2k1/plotnine/blob/logos/doc/images/logo-512.png?raw=true">
 
 Plotting with a *grammar of graphics* is powerful. Custom (and otherwise
 complex) plots are easy to think about and build incrementally, while the
@@ -42,7 +42,7 @@ Building a complex plot piece by piece.
  )
  ```
 
- <img width="90%" align="center" src="https://github.com/has2k1/plotnine/blob/main/doc/images/readme-image-1.png?raw=true">
+ <img width="90%" align="center" src="https://github.com/has2k1/plotnine/blob/logos/doc/images/readme-image-1.png?raw=true">
 
 2. Scatter plot colored according some variable
 
@@ -53,7 +53,7 @@ Building a complex plot piece by piece.
  )
  ```
 
- <img width="90%" align="center" src="https://github.com/has2k1/plotnine/blob/main/doc/images/readme-image-2.png?raw=true">
+ <img width="90%" align="center" src="https://github.com/has2k1/plotnine/blob/logos/doc/images/readme-image-2.png?raw=true">
 
 3. Scatter plot colored according some variable and
  smoothed with a linear model with confidence intervals.
@@ -66,7 +66,7 @@ Building a complex plot piece by piece.
  )
  ```
 
- <img width="90%" align="center" src="https://github.com/has2k1/plotnine/blob/main/doc/images/readme-image-3.png?raw=true">
+ <img width="90%" align="center" src="https://github.com/has2k1/plotnine/blob/logos/doc/images/readme-image-3.png?raw=true">
 
 4. Scatter plot colored according some variable,
  smoothed with a linear model with confidence intervals and
@@ -81,7 +81,7 @@ Building a complex plot piece by piece.
  )
  ```
 
- <img width="90%" align="center" src="https://github.com/has2k1/plotnine/blob/main/doc/images/readme-image-4.png?raw=true">
+ <img width="90%" align="center" src="https://github.com/has2k1/plotnine/blob/logos/doc/images/readme-image-4.png?raw=true">
 
 5. Adjust the themes
 
@@ -98,7 +98,7 @@ Building a complex plot piece by piece.
  )
  ```
 
- <img width="90%" align="center" src="https://github.com/has2k1/plotnine/blob/main/doc/images/readme-image-5.png?raw=true">
+ <img width="90%" align="center" src="https://github.com/has2k1/plotnine/blob/logos/doc/images/readme-image-5.png?raw=true">
 
  II) Or professional
 
@@ -112,7 +112,7 @@ Building a complex plot piece by piece.
  )
  ```
 
- <img width="90%" align="center" src="https://github.com/has2k1/plotnine/blob/main/doc/images/readme-image-5alt.png?raw=true">
+ <img width="90%" align="center" src="https://github.com/has2k1/plotnine/blob/logos/doc/images/readme-image-5alt.png?raw=true">
 
 ## Installation