Psytester

* run: new option --retry N that reruns each test up to N times in case it produced no score (useful when tester doesn't always flush its output)
* show: experimental support for colors (zebra pattern for the table + highlight on the best score for each group)
* show: you can show avg/sum/min/max of any custom variable; more info about that in the config files
* show: you can override precision for each column

* mmtester renamed to psytester
* run: --debug mode added
* show: new general/leaderboard replaces general/show_XXX options and allows for custom leaderboard order
* show: new options for including/excluding specific results files, use --files LIST OF FILES / --xfiles LIST OF FILES respectively; you can use both at the same time
* show: you can use --dir to specify the directory for the files

* complete overhaul of cmd line help
* --help will only show the explanation for arguments relevant to your mode (e.g. run, show, find)
* help descriptions should be more clear now
* some of the commands are invoked differently, most notable run is now "psytester r ..." instead of "psytester ..."
* run: patterns for extracting the score / metadata are converted to regex and are editable in the config files
* show: new option --var VARIABLE in order to show stats for VARIABLE instead of score
* show: --noscale override to remove scaling from cmd line
* run: removed support for AHC generator; running generator single time manually is always going to be easier than configuring it to work with psytester
* show: additional "Missing" column for tests missing score (or a specified variable)
* find: you can use --tests as a filter
* run: removed --benchmark as it was a cumbersome option and was inferior to just running "psytester show" during the run
* tester.py functions as a stand-alone script (if you need changes, you can create local copy of tester.py run it from current directory)

* separate predefined configs for topcoder/atcoder

* added support atcoder heuristic contests (AHC)
* new & improved documentation
* added support for multiple config files; --XXX-config replaced with --config-XXX commands
* renamed/added bunch of cfg options to accommodate for atcoder support

* added --generate-scripts (initial support, format might change in the future)