sync script, add log, update git ignore

.gitignore

content/test.ipynb

conversion_errors.log

sync_notebooks.py

synced_files/GA_1_1/Task_2_solution.md

synced_files/GA_1_1/Task_2_solution_clean.py

synced_files/GA_1_2/Analysis.md

synced_files/GA_1_2/Analysis_clean.py

synced_files/GA_1_2/Analysis_solution.md

synced_files/GA_1_2/Analysis_solution_clean.py

synced_files/GA_1_3/Analysis.md

synced_files/GA_1_3/Analysis_Solution.md

synced_files/GA_1_3/Analysis_Solution_clean.py

synced_files/GA_1_3/Analysis_clean.py

synced_files/GA_1_3/Warmup.ipynb

synced_files/GA_1_3/Warmup_clean.py

synced_files/GA_1_4/Analysis.ipynb

synced_files/GA_1_4/Analysis_clean.py

synced_files/GA_1_4/Analysis_solution.ipynb

synced_files/GA_1_4/Analysis_solution_clean.py