Basic calculation support using 'bc'
Added lib/units.rb -- a multi-units converter;
Simplified lib/sizes.rb -- added `-h` switch for `du`;
Added conversion support for hours.
Minor code simplification.
Fix commands module.
Merge branch 'dev' of https://github.com/pickhardt/betty into dev
Added conversion support for milliseconds, microseconds and nanoseconds.
updates tar to allow output specification
adds various common compression formats
adds command help for compression types
cleans up a little and adds short commands
Add offline speech
Merge pull request #115 from igorrKurr/say-improvment

Say improvment
Merge pull request #113 from wfalkwallace/dev

updates tar to allow output specification
Merge pull request #89 from trizen/dev

Conversion of units.
Merge pull request #81 from tuxology/dev

Basic calculation support using 'bc'
Merge pull request #106 from Ch0c0late/commands

Fix commands module.
Stop saying so much stuff when Betty doesn't know a command.
Fix calc module.
Fix require path to be relative to current file.