added various functions and classes to the repository
functionality includes:
+ publication plot helpers
+ pandas Dataframe helpers
+ A Parameter class based on pythons native float and integer types, which can store additional information
+ analysis tool for Casy Cell counting devices
+ prepending zeros to a filename that begins with an integer
+ text to speech programmable communication device
**Full Changelog**: https://github.com/flo-schu/toopy/compare/v0.1.1...v0.2.0