Adding education section and more

+ Aspell on tex files
+ Adding astrophysics in astronomy section
+ Adding computational reason for image processing

Signed-off-by: Cristian Maureira-Fredes <cmaurei@aei.mpg.de>
Aspell on education.tex

Signed-off-by: Cristian Maureira-Fredes <cmaurei@aei.mpg.de>