wq.app 0.7.4

wq.app 0.7.4 brings a couple of minor changes to wq/app.js for forward compatibility with wq.db 0.8.0. This version of wq.app is still compatible with wq.db 0.7.x.

Changes:

• Added context variable in addition to existing (the latter will be removed in wq.app 0.8.0).
• Added `` context variable to facilitate rendering inputs with array subscripts (see wq/wq.db#33)