Added missing .cmake files

cmake/PeglibCompileOptions.cmake

@@ -0,0 +1,23 @@
+include_guard(GLOBAL)
+
+if(MSVC)
+  target_compile_options(
+    CppPegLib
+
+    INTERFACE
+
+    /Zc:__cplusplus
+    /utf-8
+    /D_CRT_SECURE_NO_DEPRECATE
+    /W3
+  )
+else()
+  target_compile_options(
+    CppPegLib
+
+    INTERFACE
+
+    -Wall
+    -Wextra
+  )
+endif()

cmake/PeglibIncludePaths.cmake

@@ -0,0 +1,15 @@
+include_guard(GLOBAL)
+
+# When building via cmakelists like this, the peglib.h file is located
+# simply at the top of the peglib source tree.
+get_target_property(_source_folder CppPegLib SOURCE_FOLDER)
+
+target_include_directories(
+  CppPegLib
+
+  INTERFACE
+
+  ${_source_folder}
+)
+
+unset(_source_folder)