fix conversion to json
Fixed incorrect definition for the standard gravity

Affects conversions of pressures
Source: http://en.wikipedia.org/wiki/Standard_gravity
Adding support for the UTF-8 degree sign.
Setting file encoding to UTF-8.
precision for round func
remove some development dependencies
add plural for fluid-ounce, fixes #54
Merge pull request #53 from hobeck/gee_correction

Fixed incorrect definition for the standard gravity
Merge remote-tracking branch 'optimis/master'
Merge pull request #52 from optimis/master

Support degree symbol (with and without a space).
Merge branch 'master' of https://github.com/olbrich/ruby-units
Merge remote-tracking branch 'darthsim/master'

Conflicts:
	lib/ruby_units/unit.rb
update change log and version
Regenerate gemspec for version 1.4.2
add support for travis-ci.org
rename rakefile
update Gemfile and rename Rakefile to Travis-ci can find it
round method takes an argument in ruby 1.9 but not in 1.8
drop support for Ruby 1.8
remove support for rubinius for now.  Not compatible with mathn