Fix: Rename .assets to doc and update all image paths in README

README.md

@@ -61,7 +61,7 @@ With the MoDTA plugin installed and configured backend URI (including Moodle Sec
 
 ### Teacher
 
-When creating an assignment, a teacher can select the MoDTA exercise as a new assignment type via an additional checkbox on the assignment creation page as shown at the bottom of Fig. 3. ![Fig. 3: Moodle DTA Activation Checkbox](.assets/usage_teacher_1.png) A new standard file upload field appears  as indicated in Fig. 4. ![Fig. 4: Moodle DTA Upload File Area](.assets/usage_teacher_2.png). There, the teacher must upload a text file with the git repository URI containing the tests  as shown in Fig. 5. ![Fig. 5: Moodle DTA Teacher Text File Upload](.assets/usage_teacher_3.png) The text file has to adhere to the following format also given in the example repository:
+When creating an assignment, a teacher can select the MoDTA exercise as a new assignment type via an additional checkbox on the assignment creation page as shown at the bottom of Fig. 3. ![Fig. 3: Moodle DTA Activation Checkbox](doc/usage_teacher_1.png) A new standard file upload field appears  as indicated in Fig. 4. ![Fig. 4: Moodle DTA Upload File Area](doc/usage_teacher_2.png). There, the teacher must upload a text file with the git repository URI containing the tests  as shown in Fig. 5. ![Fig. 5: Moodle DTA Teacher Text File Upload](doc/usage_teacher_3.png) The text file has to adhere to the following format also given in the example repository:
 
 The text file has to contain the following, each separated by ::
 -	dtt as the URI-type
@@ -78,9 +78,9 @@ Students use the same format, just without the runner part at the end.
 
 ### Student
 
-Students use an additional MoDTA standard file upload field in the standard submission processs in Moodle like in Fig. 6. [Fig. 6: Moodle DTA Student File Upload](.assets/usage_student_1.png) There, they place either a zip archive or a text file adhering to the same format as the teacher's file with their code repository URI and optionally credentials and/or a ticketing system URI as shown in Fig. 7. ![Fig. 7: Moodle DTA Student Text File Upload](.assets/usage_student_2.png) 
+Students use an additional MoDTA standard file upload field in the standard submission processs in Moodle like in Fig. 6. [Fig. 6: Moodle DTA Student File Upload](doc/usage_student_1.png) There, they place either a zip archive or a text file adhering to the same format as the teacher's file with their code repository URI and optionally credentials and/or a ticketing system URI as shown in Fig. 7. ![Fig. 7: Moodle DTA Student Text File Upload](doc/usage_student_2.png) 
 
-Upon completion, students see a summarized overview of their test results in an additional column of the submission feedback table like in Fig. 8. ![Fig. 8: Moodle DTA Submission Result Summay](.assets/usage_student_3.png) Clicking on a new expansion icon in that column, they reach a detailed feedback dialog including stack traces of compile errors and test failures as in Fig. 9. ![Fig. 9: Moodle DTA Student Detail Result View](.assets/usage_student_4.png) Optionally, the MoDTA backend creates tickets for compile failures in the ticketing system under the URI provided by the student upon hand-in.
+Upon completion, students see a summarized overview of their test results in an additional column of the submission feedback table like in Fig. 8. ![Fig. 8: Moodle DTA Submission Result Summay](doc/usage_student_3.png) Clicking on a new expansion icon in that column, they reach a detailed feedback dialog including stack traces of compile errors and test failures as in Fig. 9. ![Fig. 9: Moodle DTA Student Detail Result View](doc/usage_student_4.png) Optionally, the MoDTA backend creates tickets for compile failures in the ticketing system under the URI provided by the student upon hand-in.
 
 Note: Teachers have access to the Moodle submission result view to assess student results. However, teacher control and grading are not the focus of MoDTA.