[Swift-devel] install directory change. read this - it will break your build.

[Ben Clifford]

If you are an SVN user (rather than using mainline Swift releases 
downloaded in .tar.gz form), read the following and obey the one 
instruction it contains.

The one instruction is:

  delete your cog/modules/vdsk/dist/ directory

Further information about this one instruction which you must obey 
follows. You do not have to read this:

I just committed a change to make the SVN version of swift be 'svn' rather 
than 0.3-dev. That means that swift will now build to:

dist/vdsk-svn

instead of dist/vdsk-0.3-dev

When you do an svn update and an ant redist, subsequent builds will go 
into the above directory.

However, if you already have a dist/vdsk-0.3-dev directory in place, it 
will be left there, with the previous version of swift there. This is 
almost definitely undesirable for you and you should delete that 
directory. My simplest advice is to remove the entire dist/ directory 
before making a rebuild.

If you do not delete this directory, you will almost definitely 
accidentally leave paths pointing at the old build directory, and you will 
therefore almost definitely experience confusion later on when new 
functionality and bugs do not appear, and old bugs do not disappear.

All of the above references to 'almost definitely' come from experience 
the last times we've bumped the version number; they will almost 
definitely cause you trouble if you do not read and act on this mail.

I've changed the in-SVN version to 'svn' on the basis that there is enough 
other information about SVN version numbers to render the '0.n-dev' string 
pretty useless and no longer worth the above mentioned trouble every time 
a release is made.

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