Add interface definition for ws_value_int type
Add stubs for ws_value_int type implementation
Add implementation for ws_value_init()
Add implementation for ws_value_int_set()
Add implementation for ws_value_int_get()
Add implementation for ws_value_int_cmp()
Add CMakeLists.txt entry
Merge pull request #99 from matthiasbeyer/add-value_int

Add implementation for ws_value_int type