latex_to_png fails on windows

[eendebakpt]

The latex_to_png command fails in the method latex_to_png_dvipng. The reason is the temporary file that is generated, contains a ~ in the path, which is not accepted by the latex command.

The temporary file generated is 'C:\\Users\\EENDEB~1\\AppData\\Local\\Temp\\tmpxefqozm3\\tmp.tex' The command that fails is:

            subprocess.check_call(
                ["latex", "-halt-on-error", tmpfile,
                cwd=workdir, stdout=devnull, stderr=devnull)

Locally I can fix this by changing the command to

            subprocess.check_call(
                ["latex", "-halt-on-error",  os.path.split(tmpfile)[-1]],
                cwd=workdir, stdout=devnull, stderr=devnull)

(only the last part is required, since the cwd is also set).

To make this work some other calls need to be modified as well

[ccordoba12]

I think you should do a pull request to fix this.