Clean handling of 'vw' failures.
vw-top-errors: add comments + make output wide-char safe + more sensible defaults for topN examples/features
Merge branch 'master' of git://github.com/JohnLangford/vowpal_wabbit
Merge pull request #343 from arielf/master

vw-top-errors: handle and report vw failures cleanly
pulled ezexample into vw instead of library, added library to runtests
added missing files
minor tweaks
Merge pull request #346 from hal3/master

pulled ezexample into vw instead of library, added library to runtests
fixed bug that arises if you do not snapshot but still want auto-history; improved results on argmax task
fixed holdout bug
Merge pull request #347 from hal3/master

fixed bug that arises if you do not snapshot but still want auto-history...
Merge branch 'master' of git://github.com/JohnLangford/vowpal_wabbit
Fix float point overflow when doing pass up

The old way of rounding floor(x/((float)sizeof(int)))*sizeof(int)) will
cause overflow when x is greater than 203672784. For example, if x is
203672792, the above expression will give 203672800. When this bigger
value is minus by parent_sent_pos, negative value can be generated
which is later assigned to an unsigned integer. This will cause the
whole learning fail. This patch fixes the above expression and a
potential network problem.
Merge pull request #348 from qiaomuf/master

Fix float point overflow when doing pass up
fix daemon mode breakage
Merge branch 'master' of github.com:JohnLangford/vowpal_wabbit
Merge branch 'master' of git://github.com/JohnLangford/vowpal_wabbit
Added compile fix suggestions from Ariel
initial version of python interface working!
minor cleanup of python interface