Version 0.9
* New shapes:
  * Ellipse {o}
  * Manual operation {mo}
  * Decision {c} ("Choice")
  * Trapezoid {tr}
* Eliminated memory leak
* Further parsing optimisations (pre-compiled regexes)

Version 0.8
* Parsing optimisation (~90% faster)
* Fixed line separation bugs
* Fixed open shape rendering bugs (missing lines)
* Generally more reliable
* Tidying-up of command-line options (now using Apache commons-cli)
* Streamlined release process
