close ldap connection on login

See merge request !50

Optimization of fetching targets

Closes #33

See merge request !49

don't fetch eagerly collections - only on demand in service

See merge request !48

fetch target relationship in single query

See merge request !47

filtering by drug target id added

See merge request !46

API method that allows checking if session is authenticated

See merge request !45

base url addded to config

See merge request !44

smtp protocol must be lowercased

See merge request !43

Resolve "don't allow to accept release license multiple times"

Closes #37

See merge request !42

Resolve "list of accepted licenses should refer to user in json"

Closes #34 and #36

See merge request !41

id cannot be null

See merge request !40

identifier cannot be null

See merge request !39

Resolve "allow search by synonym"

Closes #29, #28, and #26

See merge request !38

Bug fixes

Closes #31, #30, #25, #24, #27, and #32

See merge request !37