Added : php stubs file for basic IDE auto-completion

Change: readme configure instructions on specifying libdmtx install location
Added : old wrapper / wiki docs for historic purposes.
Fixed : Code spacing to tabs matching repository formatting.

README.md

@@ -5,5 +5,15 @@ Install libdmtx and ImageMagick and run the following commands:
 
     phpize
     ./configure
+
+If configure gives
+
+    checking for libdmtx... configure: error: Unable to find libdmtx installation
+
+Try using the `PKG_CONFIG_PATH` flag to provide the folder location containing `libdmtx.pc`
+
+    ./configure PKG_CONFIG_PATH=/usr/local/lib/pkgconfig
+
+
     make
     make install