prepare build script to build from lift_26 instead of master

Since we are not adding or dropping any scala release for the 2.6 release
and we have two main projects to build, depending on scala version,
I hardcoded the list of scala versions for each project
Issue #1622 - Revert DefaultConnectionIdentifier.jndiName to var
Deprecate and use property to set DefaultConnectionIdentifier.jndiName
Merge pull request #1623 from lift/tcn_issue_1622

Revert DefaultConnectionIdentifier.jndiName to var
Add implicit from tuple to SelectableOption

fixed #1628 Add implicit from tuple to SelectableOption
Remove unnecessary synchronization while getting/setting ContainerVar values.  Refs issue #1629.
Updated documentation explaining why ContainerVar doesn't need explicit synchronization.  Refs #1629.
Merge pull request #1631 from lift/dw_issue_1629

Remove unnecessary synchronization
Merge pull request #1630 from lift/diego_issue_1628

Add implicit from tuple to SelectableOption
Merge remote-tracking branch 'origin/lift_26'
Issue #1622 - Make DefaultConnectionIdentifier.jndiName immutable.

We make it a val and undeprecate it.