Merge pull request #1 from amarandon/v1.5

V1.5 : django 1.7 migration
Merge remote-tracking branch 'alex/v1.5'
add tag support to comments
add smiley support to comments
refactor tag/smiley regex and add new filters : tagalize and smilize
change blog post order to publish date
fix tags with symbol inside
set insensitive tag name for tag homepage
Improve test suite performance

 - use md5 password hashing
 - if DJANGO_TEST_FAST is defined, use sqlite in memory database
Fix microblogging reply

Fixes #48