make member required property in BlogPost model
add new test that checks for a valid member for every blogpost
fix misspelt Mongoose syntax
fix blogpost tests; add expectations for test with no member provided
Merge branch 'develop' of github.com:VarnaLab/varnalab.org into blog

merging
add two blogpost test - rejecting blog insertion with no content

adding blogpost test case
replace tabs with spaces
add member id Object check before blog create
add undescore module in blogpost test; fix test cases
Merge branch 'develop' of github.com:VarnaLab/varnalab.org into blog

Merging lates changes from upstream repository.
minor fixes on blog posts specs
Merge pull request #27 from mvelikov/blog

Adding test cases for BlogPosts