Add string.c to CMakeList.txt
Add basic ws_value_string implementation
Add method stubs to string.c

Conflicts:
	src/values/string.c

Conflicts:
	src/values/string.c
Add implementation of ws_value_string_init()
Add implementation for ws_value_string_new()
Add implementation for ws_value_string_get_str()
Add implementation for ws_value_string_set_str()
Add implementation for value_string_deinit()
Merge pull request #168 from xVin/add-string_value_type

Add string value type
Added id to monitor
Merge pull request #193 from TheNeikos/add-id_to_monitor

Added id to monitor
Add test setup for set test
Add test for init along with setup/teardown functionality
Add test for set init-deinit
Add testing setup for testing element behaviour of the set type
Add insert test for set type
Add insert/remove test for set type
Add insert-get-remove test for set type
Add multi-set setup/teardown
Add union test for set type