Merge RFC4 (#1865)

This commit is the result of the squashing of rfc4_dev branch in a single
commit. It implements mostly RFC 4 related work.

* Grid handling:
  - remove obsolete and presumably unfinished implementation of grid catalog functionality
  - all grid functionality is in grids.cpp/.hpp
  - vertical and horizontal grid shift: rework to no longer load whole grid into memory
  - remove hgrids and vgrids member from PJ structure, and store them in hgridshift/vgridshift/deformation structures
  - build systems: add optional libtiff dependency. Must be explicitly disabled if not desired
  - add support for horizontal and vertical grids in GeoTIFF, if libtiff is available
  - add GenericShiftGridSet and GenericShiftGrid classes, relying on TIFF grids, that can be used for generic purpose grid-based adjustment
  - add a +proj=xyzgridshift method to perform geocentric translation by grid. Used for French NTF to RGF93 transformation using gr3df97a.tif grid
  - deformation: add support for +grids= for GeoTIFF grids
  - horizontal grid shift: fix failures on points slightly outside a subgrid (fixes #209)

* File management:
  - add a filemanager.cpp/.hpp to deal with file related work
  - test for legacy proj_api.h fileapi
  - proj.h: add proj_context_set_fileapi() and proj_context_set_sqlite3_vfs_name() (fixes #866)
  - add capability to read resource files from the user writable directory

* Network access:
  - build systems: add optional curl dependency
  - add a curl-based default implementation for network related functionality
  - proj.h: add C API to control network functionality, and optionaly provide network callbacks
  - add data/proj.ini with default settings
  - add a SQLite3 local cache of downloaded chunks
  - add proj_is_download_needed() and proj_download_file()

* Use Win32 Unicode APIs and expect all strings to be UTF-8 (fixes #1765)
  For backward compatibility, if PROJ_LIB content is found to be not UTF-8 or
  pointing to a non existing directory, then an attempt at interpretating it
  in the ANSI page encoding is done.
  proj_context_set_search_paths() now assumes strings to be in UTF-8, and
  functions returning paths will also return values in UTF-8.

1 files changed, 13 insertions, 2 deletions

diff --git a/data/CMakeLists.txt b/data/CMakeLists.txt
index f0e1dab6..cf20fea4 100644
--- a/data/CMakeLists.txt
+++ b/data/CMakeLists.txt
@@ -2,6 +2,10 @@
 # files containing dictionary of useful projection
 #
 
+set(CONFIG_FILES
+  proj.ini
+)
+
 set(PROJ_DICTIONARY
   null
   world
@@ -54,7 +58,7 @@ add_custom_command(
 add_custom_target(generate_proj_db ALL DEPENDS ${PROJ_DB})
 
 if(NOT "${CMAKE_CURRENT_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_BINARY_DIR}")
-  foreach(FILE ${PROJ_DICTIONARY} ${GRIDSHIFT_FILES})
+  foreach(FILE ${CONFIG_FILES} ${PROJ_DICTIONARY} ${GRIDSHIFT_FILES})
     configure_file(${FILE} ${FILE} COPYONLY)
   endforeach()
 endif()
@@ -78,18 +82,25 @@ set(DATA_FOR_TESTS
     nzgd2kgrid0005.gsb
     ITRF2000
     BETA2007.gsb)
+file(GLOB DATA_TESTS tests/*)
 
 execute_process(COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_CURRENT_BINARY_DIR}/for_tests)
-foreach(FILE ${DATA_FOR_TESTS})
+execute_process(COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_CURRENT_BINARY_DIR}/for_tests/tests)
+foreach(FILE ${DATA_FOR_TESTS} ${CONFIG_FILES})
     if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/${FILE})
         configure_file(${CMAKE_CURRENT_SOURCE_DIR}/${FILE} ${CMAKE_CURRENT_BINARY_DIR}/for_tests/${FILE} COPYONLY)
     endif()
 endforeach()
+foreach(FILE ${DATA_TESTS})
+    get_filename_component(FILENAME ${FILE} NAME)
+    configure_file(${FILE} ${CMAKE_CURRENT_BINARY_DIR}/for_tests/tests/${FILENAME} COPYONLY)
+endforeach()
 
 #
 #install
 #
 set(ALL_DATA_FILE
+  ${CONFIG_FILES}
   ${PROJ_DICTIONARY}
   ${GRIDSHIFT_FILES}
   ${PROJ_DB}