Set default compiler to be the same that built dub
Merge pull request #303 from ibuclaw/default_compiler

Set default compiler to be the same that built dub
Fix the --compiler help message to mark the correct default compiler. See #303.
Update dependency syntax for "dub init" packages of type "vibe.d".
Fix member naming convention.
Include lightweight GIT tags when determining local package versions.
Run executables _after_ generation has finished.

In particular, the generated application is run after the copyFiles have been placed. This is a fix for a regression that was introduced after the last release version.
Fix path based dependencies. See #282 and #253.
Remove unused prototype.
Update unit test for new path based dependency behavior.
For "dub run", change the CWD only if non-empty. Fixes #272.
Switched dub.fetch() to take an enum FetchOptions instead of 4 bools.
Merge pull request #305 from ColdenCullen/master

Switched dub.fetch() to take an enum FetchOptions instead of 4 bools
Always treat tag descendant commits as build metadata.

This avoids having to constantly perform "dub upgrade --prerelease" when new commits get added to a branch that descends from a tagged pre-release version.
Add a "commit" prefix for descendant versions.
Handle invalid version selections gracefully.

When a selected version of a package doesn't exist anymore (locally any in the registry) for some reason, DUB now falls back to the best match automatically.
Only overwrite dub.selections.json if there are actual changes.
Rename m_selectedVersions -> m_selections.
*Rally* only overwrite dub.selections.json if necessary.
Rebuild packages when dub.json (all packages) or dub.selections.json (root package) changed.