Reduced as many db calls as number of tags

With 150 tags in our db, just reduced number of db calls by 150 :)
Removed unused import
get_blog() was written for a reason
Use get_blog()
No need to get Blog object so many times
space is not required between function name and its arguments
use get_blog()
ordering is already defined on BlogEntry
Remove commented code
Merge pull request #42 from agiliq/develop

Develop