correct typos, adapt chmod of bash scripts

Signed-off-by: Matthias <matthias@pebble>

README.md

@@ -3,9 +3,9 @@ Simple code to download images in one or several mapillary sequences. The images
 
 ## How to use
 ### Setup env variables
-copy the secret variables files to setup your maipllary dev token, and your panoramax OpenStreetMap token.
+copy the secret variables files to setup your mapillary dev token, and your panoramax OpenStreetMap token.
 ```Shell
-cp secrets_variables_examples.sh secrets_variables.sh
+cp secrets_variables_example.sh secrets_variables.sh
 editor secrets_variables.sh
 ```
 
@@ -13,10 +13,13 @@ editor secrets_variables.sh
 To avoid to download everything at once, this is a 2 steps process:
 - 1/ We set a list of users for which we want to get the list of sequences to download, and get a bash script for each user.
    Change the list of users in the batch file `batch_get_username.sh`. 
-   change the access token with your access token and the sequence ids with the ids of the sequences you want to download
    ```bash
    usernames=( "someone_having_nice_pictures" "someone_else" "oh_look_a_these_usernames" ) # use real accounts, it might work better
    ```
+   then, execute:
+   ```bash
+   ./batch_get_username.sh
+   ```
    This will give you a few files that the other scripts will use to generate a script to download all sequences of each user. One user, one bash script generated.
 
 
@@ -25,7 +28,7 @@ To avoid to download everything at once, this is a 2 steps process:
    bash script_bash_get_sequences_for_user_SOMEONE.sh
    ```
    **Or all of the generated batch scripts at once.**
-   
+
    ```bash
    bash script_bash_get_sequences_for_user_*
    ```
@@ -101,7 +104,7 @@ python3 -m venv mly_venv
 source mly_venv/bin/activate
 python -m pip install -r requirements.txt
 ```
-Then you can run `python mapillary_download  "MLY|xxxx|xxxxxxx" --sequence_ids xxxxxxxxxxx`
+Then you can run `python mapillary_download.py  "MLY|xxxx|xxxxxxx" --sequence_ids xxxxxxxxxxx`
 When you're done with the script, simply run `deactivate` to exit the virtual environnement.
 
 On windows you can create a virtual environnement too, or use the prebuilt `mapillary_download.exe` available on the release page.