Create djangodocssearch.sublime-settings

Add settings file so that the version of docs to be searched can be set
Update djangodocssearch.py

Load docs version from settings into search url
Rename djangodocssearch.sublime-settings to DjangoDocsSearch.sublime-settings
Create Main.sublime-menu

Open file for settings
Update DjangoDocsSearch.sublime-settings

Set default version to 1.5.x
Merge pull request #4 from chaselee/patch-1

Create settings for Django docs version