updated changelog

ChangeLog

+  ----- version 1.7 ------
+
+2017-10-24  Mark Lindner  <markl@avalon>
+
+	* INSTALL - Added information about installing from a git snapshot
+	* configure.ac - Bumped version to 1.7
+	* doc/libconfig.texi - Updated documentation
+	* examples/c/Makefile.am, examples/c/example4.c, examples/c/example4.cfg,
+	  examples/c/cfg_includes/*.cfg - New example program
+	* lib/Makefile.am - bumped library version to 11:0:0; added new source
+	  files
+	* lib/grammar.c, lib/grammar.y, lib/scanner.c, lib/scanner.h - regenerated
+	* lib/grammar.y - allow optional trailing comma in lists and arrays
+	* *.vcproj - updated with new source files, library dependency
+	* lib/libconfig.c, lib/libconfig.h - various code cleanup;
+          reworked options API; moved some value parsing logic into lib/util.c
+          and lib/util.h; added new option
+          CONFIG_OPTION_ALLOW_SCIENTIFIC_NOTATION; bugfix to disallow adding a
+          group to a list or array; changed default float precision from 2 to 6;
+          fixed conversion between int and int64 types; added config_clear();
+          added support for include functions; added config_set_hook() and
+	  config_get_hook()
+	* lib/libconfigcpp.c++, lib/libconfig.h++ - moved Option enum from Setting
+	  to Config; added OptionAllowScientificNotation; added clear();
+          reworked options API; added evaluateIncludePath(); fixed casting to
+          unsigned int (don't clip negative values to 0)
+	* lib/parsectx.c, lib/parsectx.h - code cleanup
+        * lib/scanctx.c, lib/scanctx.h - added support for include functions;
+          code cleanup; removed non-portable directory reading code;
+        * lib/scanner.l - added support for include functions; moved some parsing
+	  code to lib/util.c and lib/util.h; code cleanup
+	* lib/strbuf.c, lib/strbuf.h - added strbuf_append_char(); code cleanup
+	* lib/strvec.c, lib/strvec.h - new functions for managing arrays of
+	  string pointers (for filename lists)
+        * lib/util.c, lib/util.h - value parsing and formatting code and memory
+	  management macros and functions extracted from other files
+	* lib/wincompat.h - new macros for testing relative paths; replaced
+	  INT32_MAX/INT32_MIN with INT_MAX/INT_MIN.
+        * tests/tests.c - fixed test failures and improper testing of int type
+          conversions
+
+  ----- version 1.6 ------
+
 2015-12-31  Jose Luis Tallon <jltallon@adv-solutions.net>
 
         * Added include_dir feature (support for Debian-style conf.d/
@@ -22,8 +65,6 @@
         * Resync Debian packaging
 	  includes updated packages for GCC5 transition
 
-        ----- version 1.6 ------
-
 2015-10-14  Thomas Fischer <fischer@unix-ag.uni-kl.de>
 
 	* configure, configure.ac, debian/libconfig++9-dev.install,