Some markdown import errors are not caught

[ralsina]

So without markdown installed, things look bad even when doing nikola --version. This was reported to the mailing list:

    ERROR:yapsy:Unable to import plugin: /home/maturano/Workspace/envs/nikola/local/lib/python2.7/site-packages/nikola/plugins/compile/markdown/mdx_nikola
    Traceback (most recent call last):
      File "/home/maturano/Workspace/envs/nikola/local/lib/python2.7/site-packages/yapsy/PluginManager.py", line 487, in loadPlugins
        candidate_module = imp.load_module(plugin_module_name,plugin_file,candidate_filepath+".py",("py","r",imp.PY_SOURCE))
      File "/home/maturano/Workspace/envs/nikola/local/lib/python2.7/site-packages/nikola/plugins/compile/markdown/mdx_nikola.py", line 30, in <module>
        from markdown.postprocessors import Postprocessor
    ImportError: No module named markdown.postprocessors
    ERROR:yapsy:Unable to import plugin: /home/maturano/Workspace/envs/nikola/local/lib/python2.7/site-packages/nikola/plugins/compile/markdown/mdx_podcast
    Traceback (most recent call last):
      File "/home/maturano/Workspace/envs/nikola/local/lib/python2.7/site-packages/yapsy/PluginManager.py", line 487, in loadPlugins
        candidate_module = imp.load_module(plugin_module_name,plugin_file,candidate_filepath+".py",("py","r",imp.PY_SOURCE))
      File "/home/maturano/Workspace/envs/nikola/local/lib/python2.7/site-packages/nikola/plugins/compile/markdown/mdx_podcast.py", line 43, in <module>
        from markdown.extensions import Extension
    ImportError: No module named markdown.extensions
    ERROR:yapsy:Unable to import plugin: /home/maturano/Workspace/envs/nikola/local/lib/python2.7/site-packages/nikola/plugins/compile/markdown/mdx_gist
    Traceback (most recent call last):
      File "/home/maturano/Workspace/envs/nikola/local/lib/python2.7/site-packages/yapsy/PluginManager.py", line 487, in loadPlugins
        candidate_module = imp.load_module(plugin_module_name,plugin_file,candidate_filepath+".py",("py","r",imp.PY_SOURCE))
      File "/home/maturano/Workspace/envs/nikola/local/lib/python2.7/site-packages/nikola/plugins/compile/markdown/mdx_gist.py", line 127, in <module>
        from markdown.inlinepatterns import Pattern
    ImportError: No module named markdown.inlinepatterns
    [2014-04-04T11:44:51Z] WARNING: Nikola: In order to USE_BUNDLES, you must install the "webassets" Python package.
    [2014-04-04T11:44:51Z] WARNING: Nikola: Setting USE_BUNDLES to False.
    Nikola v7.0.0-alpha

[maturanomx]

Works now 👍