typo: birthday***

Crypto added .

Used MD5 for ids.

Fixed README.md

documented with doxygen and fixed README.md

database class modified and commented .

editBookComment and editBookPartComment insert and delete user liked adn

made unique keys of Users and Books .

delete functions added .

insertBookComment and insertBookPartComment and insertPart added .

update functions added workaround(need to optimize).

saveBooks and saveUser and getBooks completed and tested .

insertBooks fixed but id of books still need working .

Working on database insertBook function added by constant values need to

trash deleted.