Update version, year for Windows builds, etc. (#830)

Update version, year for Windows builds, etc. (#830)

* Add new files from win32 to Makefile.am

- New files were added in the Makefile.am to EXTRA_DIST

* Update version for Windows builds to 1.7.0

- Changed version from 1.4.999 to 1.7.0

* Update Copyright year and ProductName in rc files

- Change year 2013 to 2017
- Change "ProductName" from
  "time-series data storage and display system" to "RRDtool"