Merge pull request #166 from avsm/master

Fix the Mirage HTTP compilation problem by using the new split HTTP libraries
Merge pull request #167 from avsm/master

Release 1.0.3
Merge pull request #169 from avsm/master

[xen] Don't actually try to run xl create (very system specific), but ju...
Add default build tags for annot, bin_annot, principal and strict_sequence

(also bump to 1.0.4 working version)

Closes #173