Use keys method from Hash

Signed-off-by: Laurent Arnoud <laurent@spkdev.net>
now prefixing with '1' if string starts with recognized word but no number, ie. 'day'
Fix inserting zero in front of number after decimal point with format :chrono
Fix output if seconds end with .0
Fill with zeros in chrono output if seconds are 0
First pass at file changes
Ignore the right files
Don't commit Gemfile.lock
Merge pull request #11 from spk/map_keys

Use keys method from Hash
Merge pull request #14 from phulst/master

now prefixing with '1' if string starts with recognized word but no number, ie. 'day'
Spec refactor
Resolve conflicts
Better specs
Add summary attribute
Add Travis config
Update docs
Looking for additional maintainers
Add Travis status to README
Merge pull request #22 from DSIW/master

Fix inserting zero after decimal point and unnecessary zeros
Bump version after latest bug fixes from pull requests