version bump
Add utils.autodiscover_templates method

Autodiscover `cmsplugin_simple_markdown` templates the way
'django.template.loaders.filesystem.Loader' and
'django.template.loaders.app_directories.Loader' work.
Add python package requirements.txt file
Add template field to SimpleMarkdownPlugin model
Generate migrations for template field
add django-markwhat to req file
Update version to 1.4
Add more pkgs to setup.install_requires
render our dynamic template
Merge pull request #5 from Alir3z4/feature-#4-multi-templates

Feature #4 multi templates
Fixes #4