Reduced docutils halt_level from 4 to 3
Reduced docutils halt_level from 4 to 3

I found that my documents that had errors consistently caused subsequent
processing by pdflatex to fail completely. This change makes documents with
ReST errors fail before being passed on to pdflatex.

springcoil/euroscipy_proceedings,mjklemm/euroscipy_proceedings,Stewori/euroscipy_proceedings,euroscipy/euroscipy_proceedings,katyhuff/scipy_proceedings,springcoil/euroscipy_proceedings,SepidehAlassi/euroscipy_proceedings,juhasch/euroscipy_proceedings,SepidehAlassi/euroscipy_proceedings,euroscipy/euroscipy_proceedings,chendaniely/scipy_proceedings,michaelpacer/scipy_proceedings,katyhuff/scipy_proceedings,euroscipy/euroscipy_proceedings,mwcraig/scipy_proceedings,helgee/euroscipy_proceedings,mikaem/euroscipy_proceedings,juhasch/euroscipy_proceedings,mikaem/euroscipy_proceedings,mwcraig/scipy_proceedings,sbenthall/scipy_proceedings,katyhuff/scipy_proceedings,sbenthall/scipy_proceedings,dotsdl/scipy_proceedings,Stewori/euroscipy_proceedings,mjklemm/euroscipy_proceedings,springcoil/euroscipy_proceedings,SepidehAlassi/euroscipy_proceedings,sbenthall/scipy_proceedings,chendaniely/scipy_proceedings,mikaem/euroscipy_proceedings,juhasch/euroscipy_proceedings,helgee/euroscipy_proceedings,dotsdl/scipy_proceedings,helgee/euroscipy_proceedings,mjklemm/euroscipy_proceedings,michaelpacer/scipy_proceedings,michaelpacer/scipy_proceedings,chendaniely/scipy_proceedings,Stewori/euroscipy_proceedings,dotsdl/scipy_proceedings,mwcraig/scipy_proceedings