new KDevPlatform API for consideration

[Matt Rogers]

Hi,

Hamish and I have been working on making some improvements to the platform 
api, especially with regards to KDevProject. Please take a look at the 
kdev-nice-project branch in branches/work/kdev-nice-project and please 
provide feedback. Below are some of the changes to the API:

- Split KDevProject to distinguish between projects that don't require a build 
system and ones that do. KDevBuildableProject is availabe for those projects 
that require a build system or some sort of compile to be runnable.

- Rename KDevProjectEditor to KDevFileManager. Split KDevFileManager into 
KDevFileManager and KDevBuildManager. The former does not deal with the build 
system, while the latter does. Most operations occur on KUrls now, meaning 
that projects may not necessarily be stored locally anymore. The language 
support will have to determine whether or not to enforce the "project must be 
stored locally" limitation, but that has yet to be added to the API.

- Enforce the singleton design pattern in KDevApi. This is already done in 
KDevelop's shell library. We've just moved it one level down.

Thanks for any comments and feedback. 
--
Matt