Convert CMake-language commands to lower case

Ancient CMake versions required upper-case commands.  Later command
names became case-insensitive.  Now the preferred style is lower-case.

Run the following shell code:

cmake --help-command-list |
grep -v "cmake version" |
while read c; do
    echo 's/\b'"$(echo $c | tr '[:lower:]' '[:upper:]')"'\(\s*\)(/'"$c"'\1(/g'
done >convert.sed &&
git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' |
egrep -z -v '^(Utilities/cm|Source/kwsys/)' |
xargs -0 sed -i -f convert.sed &&
rm convert.sed

Modules/CMakeVS71FindMake.cmake

@@ -12,7 +12,7 @@
 # (To distribute this file outside of CMake, substitute the full
 #  License text for the above reference.)
 
-FIND_PROGRAM(CMAKE_MAKE_PROGRAM
+find_program(CMAKE_MAKE_PROGRAM
   NAMES devenv
   PATHS
   [HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\VisualStudio\\7.1\\Setup\\VS;EnvironmentDirectory]
@@ -21,6 +21,6 @@ FIND_PROGRAM(CMAKE_MAKE_PROGRAM
   "c:/Program Files/Microsoft Visual Studio.NET/Common7/IDE"
   "/Program Files/Microsoft Visual Studio .NET/Common7/IDE/"
   )
-MARK_AS_ADVANCED(CMAKE_MAKE_PROGRAM)
-SET(MSVC71 1)
-SET(MSVC_VERSION 1310)
+mark_as_advanced(CMAKE_MAKE_PROGRAM)
+set(MSVC71 1)
+set(MSVC_VERSION 1310)