adds a 'strftime' jinja fiter that uses LOCALE
added tests for DateFormatter
added FR and TR locale generation to travis
reset locale after DateFormatter test
ignore emacs lock files and exception handling for watchers
Merge pull request #860 from avaris/strftime-jinja-filter

Fix for #701: adds a 'strftime' jinja fiter that uses LOCALE
Merge pull request #862 from avaris/emacs-autoreload

ignore emacs lock files and exception handling for watchers