fix typo
update creating techniques feature spec
move sign_up into a before block
code for viewing single techniques
add category_name method to technique
use category_name as grouping
prepare techniques/index view for generic grouping
replace long feature test with faster unit test
make doc string more clear
switch to capybarawebkit
update seeds file to create a bunch of techniques
let the user choose the sorting
add meta view tag
remove debug statement
toggle showing techniques on the index view