Added the nice to have list as a TODO

Author: jwieringa

TODO.md

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+- browsermob proxy
+- csv provider
+- db provider
+- some site / 'project' that acts as both documentation and test suite
+- screenshot
+- on error
+- on completion
+- by name
+- by sequence
+- on demand
+- hard vs. soft assert
+- custom profile
+- firefox
+- opera
+- chrome
+- flex pilot (for flex/flash support)