Merge pull request #2 from StrathSEDS/master

update develop
Update blog posts
add facebook meta info
rename other includes
change include links in default layout
Update 2013-07-20-Pulse-plasma-thruster.md
Update 2013-07-20-Pulse-plasma-thruster.md
Merge branch 'develop'
Merge pull request #4 from StrathSEDS/develop

Develop