Added option to connect through unix socket in redis cache driver
Correct Redis connection troubleshooting
some code rewrite
Code cleanup
Update Redis Caching block

Added config options
Added changelog entry
Merge branch 'develop' of github.com:kakysha/CodeIgniter into develop
Spaces, log message
typos
Update caching.rst
newline at the eof
Merge pull request #2705 from kakysha/develop

Better Redis connection handling
Update readme.rst
add travis php 5.5
Merge pull request #2706 from manmath/patch-1

Update readme.rst
Merge pull request #2707 from sv3tli0/patch-1

add travis php 5.5
Update sess_time_to_update description (rel #2397)
Fix a bug when multiple calls to QB's _compile_wh() or _compile_group_by() are required