Split IBasicVersionControl into IBasicVersionControl (for (D)VCS) and IVersionControl (for VCS)

[Evgeniy Ivanov]

There are two ways to add DVCS plugins in KDevelop: add the code for 
IDistributedBasicVersionControl (clone in some places 10 lines with 
changes for IDistributed) or to
split IBasicVersionControl into IBasicVersionControl (for (D)VCS) and 
IVersionControl (for VCS), so in some places IBasicVersionControl may be 
used both  for VCS and DVCS plugins.
First approach will not brake current SVN/Perforce/CVS plugins, but we 
will have about 2-3 ugly functions. Using second we have to do minor 
changes to VCS plugins, but the code will be looked cute.

-- 
Best Regards,
Evgeniy