Log Message:
stagit: update to 0.9.5.

ChangeLog:

- change STAGIT_BASEURL to an -u option and also update the example script
- add $STAGIT_BASEURL environment variable to make Atom links absolute
- README: mention tags.xml feature
- micro-optimization: fputc (function) -> putc (macro/inline function)
- fix warning with libgit2 v0.99+, remain compatible with older versions
- add abbreviated commit hash to submodule file
- add meta viewport for scaling on mobile
- style.css: improve contrast
- use size_t to count lines
- avoid shadowed `name' global variable
- refs_cmp: remove unneeded cast
- use LEN() macros for arrays