added Hashtag model
changed create/reply post views to be more conventional in terms of errors returned
added manager to automatically create hashtags when saving a post; also fixed replying (broke it earlier)
Added search link to navbar
Create testLog1

Adding in the initial test results from earlier today
Update testLog1

forgot to add the test result key
Create testLog2

The rest of the test logs before the group meeting got into full swing
Merge pull request #13 from philringsmuth/S53_Hashtags

S53 #hashtags
created search backend for searching posts by hashtag (search results template still empty)
changed reload ajax url to empty, so that the current page (not necessarily home page) is always loaded
Merge branch 'develop' into S54_SearchPostsByHashtag
finished frontend for hashtag searching
made hashtags case-insensitive
made search field required