PARQUET-704: Install scan-all.h

Small detail overlooked in PARQUET-681

Author: Wes McKinney <wes.mckinney@twosigma.com>

Closes apache#151 from wesm/PARQUET-704 and squashes the following commits:

8ce137c [Wes McKinney] Install scan-all.h

Change-Id: I9fc0c48caed22626a27bd68d59846d1b700a79a3

Author: wesm

cpp/src/parquet/column/CMakeLists.txt

@@ -17,10 +17,11 @@
 
 # Headers: top level
 install(FILES
-  page.h
   levels.h
+  page.h
   properties.h
   reader.h
+  scan-all.h
   scanner.h
   writer.h
   DESTINATION include/parquet/column)