Added comments for Zephir

Author: Nikita Gusakov

Zephir.gitignore

@@ -1,5 +1,15 @@
+# Cache files, generates by Zephir
 .temp/
 .libs/
+
+# Object files, generates by linker
+*.lo
+*.la
+*.o
+*.loT
+
+# Files generated by configure and Zephir,
+# not required for extension compilation.
 ext/build/
 ext/modules/
 ext/Makefile*
@@ -14,7 +24,3 @@ ext/mkinstalldirs
 ext/run-tests.php
 ext/.deps
 ext/libtool
-*.lo
-*.la
-*.o
-*.loT