Editline v1.15.0

Changes

• Add support for --disable-eof and --disable-sigint to disable
  default Ctrl-D and Ctrl-C behavior
• Add support for el_no_hist to disable access to and auto-save of history
• GNU readline compat functions for prompt handling and redisplay
• Refactor: replace variables named 'new' with non-reserved word
• Add support for Travis-CI, continuous integration with GitHub
• Add support for Coverity Scan, the best static code analyzer,
  integrated with Travis-CI -- scan runs for each push to master
• Rename NEWS.md --> ChangeLog.md, with symlinks for make install
• Attempt to align with http://keepachangelog.com/ for this file
• Cleanup and improve Markdown syntax in README.md
• Add API and example to README.md, inspired by libuEv
• Removed generated files from version control. Use ./autogen.sh
  to generate the configure script when working from GIT. This
  does not affect distributed tarballs

Fixes

• Fix issue #2, regression in Ctrl-D (EOF) behavior. Regression
  introduced in 1.14.1. Fixed by @TobyGoodwin
• Fix memory leak in completion handler. Found by Coverity Scan.
• Fix suspicious use of sizeof(char **), same as sizeof(char *) but
  non-portable. Found by Coverity Scan
• Fix out-of-bounds access in user key binding routines
  Found by Coverity Scan.
• Fix invisible example code in man page