adding packages and theme markdown

packages.md

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+# Packages
+## General
+- a file icon
+- brackethighlighter
+- expand tabs on save
+- sidebarenhancements
+
+## Python-development
+- anaconda
+- buildview
+- requirementstxt
+- sublack
+- sublime text - virtualenv
+- sublimelinter
+    - sublimelinter-pycodestyle
+    - sublimelinter-pyflakes
+- sublimerepel
+- virtualenv