New name system

[mstimberg]

To get this out of the way, I implemented the changes to the naming system we discussed in #47 . Classes no longer have a basename attribute, instead they simply define e.g. neurongroup* as the default value for the name keyword argument. Internal objects that don't take a name argument might construct a name themselves, e.g. the Tresholder object calls the BrianObject initializer with name=group.name+'_'+'thresholder*'.

[coveralls]

Coverage remained the same when pulling de0572d on name_system into 09d6478 on master.

[thesamovar]

Thanks for writing this Marcel. One slight issue before I merge. For GroupCodeRunner you can pass a name argument, but this doesn't represent the actual name it will have because it prepends the group name. We should either (1) document this in the name argument (which currently doesn't mention the fact that the actual name will be a compound name), or (2) change the behaviour so that the default behaviour is name=None and then it constructs a compound name, or you specify the full name. I marginally prefer (2) I think because then the name argument behaves consistently everywhere it is used.

[coveralls]

Coverage remained the same when pulling 1de9c14 on name_system into 09d6478 on master.

[mstimberg]

While writing it I first thought of doing (2), but then it wouldn't be possible to have a more specific name automatically, i.e. not neurongroup_coderunner but neurongroup_stateupdater, neurongroup_resetter, etc. For this we'd have to do the name construction in every subclass and this would be a bit repetitive. It wouldn't be too bad on the other hand, so maybe it's better to do it like this for consistency. My reasoning why I thought I could "get away with it" was that GroupCodeRunner is never called by the user. In the only place where it indirectly is, in the runner method, I actually implemented the variant (2). Which makes me wonder now whether the created name will have the group name twice...? I'll change it to make it consistent.

[coveralls]

Coverage remained the same when pulling 4eb02ff on name_system into 09d6478 on master.

[thesamovar]

Nice! Merging now.