Summary: ttt v0.1.0 released

This is the initial release.

Provided tools:
- accrpl, realised profits/losses
- accsum, summary of accounts
- align, align timestamped data
- candle, analyse quotes in fixed size windows and print summary
- eva, continuously evaluate a portfolio
- evtdist, analyse timestamped events in fixed size windows
- fra, print absolute rates from spot quotes and forward points
- gentrades, generate random trade signals
- imp, calculate impact of orders
- mid, produce a series of quotes with constant spread
- opt, find optimal entry and exit points
- qq, quantise quotes such that the difference between two
  consecutive quotes exceeds a certain threshold
- quodist, analyse quotes in fixed size windows
- rolling, roll a window of fixed duration across timestamped input
- sma, return simple moving tick delta average and variance
- spread, calculate a spread contract from two or more inputs
- thours, return summary of when events occur
- xevent, split file into chunks around some event timestamps