Problems with 0.12dev

[Costache Catallin]

When I used this plugin with trac multirepos 0.12dev and genshi 0.6dev it gave two problems.

1. On the client side you try to find the chrome path of the trac installation by finding the gridmod.js script with a jquery css selector rule like $("script[src~="gridmod"]) which is incorrect because jquery documentation states that this matches gridmod as a separated word (separated by spaces). The fix is to use $("script[src*="gridmod"]).
2. Trac 0.12dev gave an error when sending back the OK response from an ajax request because the Content-Length header was mandatory.

I have attached a patch with the small fixes that make it work properly on trac 0.12dev.

[Costache Catallin]

small fixes

[Björn Harrtell]

(In [8322]) Fixed 0.12 showstoppers (closes #6514)

[Ryan J Ollos]

#10301 closed as a duplicate.