merge issue37
add a missing parenthesis
master update
Merge branch 'issue51'
Merge remote-tracking branch 'sourcetocc/master'

Conflicts:
	libtocc/src/libtocc/database/database.cpp
	libtocc/src/libtocc/database/scripts.h
	libtocc/tests/Makefile.am
	libtocc/tests/database/set_title_tests.cpp
remove a duplicate code
issue38
API : set title to a group of files
API : update Manager::set_titles() comment
CLI : change set-title command's error message +  support to set title to a group of files
CLI : update set-title help message + correct the command's error message
Merge branch 'issue38' of https://github.com/hlyassine/tocc into yassine-issue38
update
Merge branch 'issue38' of https://github.com/hlyassine/tocc into yassine-issue38
Merge branch 'yassine-issue38'

issue #38 and pull request #57