-remove '-defaultlib' from dub.json

-start working with WebAssembly
-modified .gitignore
-added meson build file (WIP)

meson.build

@@ -0,0 +1,44 @@
+project('DECS', 'd')
+
+src = [
+	'source/ecs/attributes.d',
+	'source/ecs/block_allocator.d',
+	'source/ecs/core.d',
+	'source/ecs/entity.d',
+	'source/ecs/events.d',
+	'source/ecs/hash_map.d',
+	'source/ecs/id_manager.d',
+	'source/ecs/manager.d',
+	'source/ecs/simple_vector.d',
+	'source/ecs/simple_vector.d',
+	'source/ecs/std.d',
+	'source/ecs/system.d',
+	'source/ecs/traits.d',
+	'source/ecs/vector.d',
+	'source/ecs/package.d'
+]
+
+tests_src = [
+	'tests/tests.d'
+]
+
+betterC_opt = get_option('betterC')
+
+comp = meson.get_compiler('d')
+
+comp_id = comp.get_id()
+
+args = []
+link_args = []
+
+if betterC_opt
+	args += '-betterC'
+	link_args += '-betterC'
+endif
+
+inc = include_directories('source/')
+tests_inc = include_directories('source/')
+
+executable('ecs', [tests_src, src], include_directories : [tests_inc, inc], d_args: args, link_args: link_args)
+
+