Add support for vim-endwise

Derived from (seemingly dead) PR: tpope/vim-endwise#97

Author: thetic

after/ftplugin/cmake.vim

@@ -0,0 +1,11 @@
+scriptencoding utf-8
+
+if exists('b:loaded_cmake_plugin')
+  finish
+endif
+let b:loaded_cmake_plugin = 1
+
+let b:endwise_addition = '\=submatch(0) ==# toupper(submatch(0)) ? "END" . submatch(0) . "()" : "end" . submatch(0) . "()"'
+let b:endwise_words = 'foreach,function,if,macro,while'
+let b:endwise_pattern = '\%(\<end\>.*\)\@<!\<&\>'
+let b:endwise_syngroups = 'cmakeStatement,cmakeCommandConditional,cmakeCommandRepeat,cmakeCommand'