Details view

Added Details Template and modified corresponding files - ! does not
work until now!
added image and title link

but POST and GET still doesn't work
test posting book title

still sth missing
different try on post

in case we can't find a way how this option works -> go back to commit
0cfcc7
resolved syntax error in POST

correct GET statement is missing
test with post

post - get still not working
haystack-search
merge with details
added books-detail page
added new pip-installs