Merge pull request #31 from pelikanchik/alexg

Alexg
Fixed bad performance of "forward" button on low size browser windows. Tracked all magic numbers down and brought them all down.
Added a "check all" button
Disabling of buttons while sending answers to the server; fixing bugs concerning 'sticky' behaviour
minor bug fix
(removed debug stuff)
New functionality implemented: graphical representation of subsection
(buttons 'go' and 'check-all' are horizontal now)
Minor bug fix, mainly for Chrome
z-index fix
(beta: descriptions of nodes in graph)
(Node details are implemented as proof-of-concept)
Edges labeling implemented (as proof-of-concept)
Edge labeling and node details can be shown to people without embarrassment
Merge pull request #39 from pelikanchik/bt

Bt