Added initial version of dashed and dotted cell borders.
Fixed syntax error.
Fixed typos.
Fixed single value not working.
Fixed problems with array length when checking border lines.
Fixes for dotted border.
Added page to manual showing how to use border lines.
Added specs for cell border lines.
add MRI 2.0.0 preview to travis

* if the build fails, don't fail the full build. I'm just adding it for
  information at this point
* also stop failures on jruby and rbx failing the full build. They're
  not supported runtimes yet
update deprecated code in Rakefile

* rake 10.0 removed some old files, the tasks for rdoc and building gems
  are now defined in the respective gems
ruby-head does not reflect correctly MRI 2.0

Update to use 2.0.0 instead
Merge pull request #423 from joneslee85/patch-3

ruby-head does not reflect correctly MRI 2.0
correct the use of allow_failures in travis config file
switch from test-spec to rspec

* test-spec is seemingly abandoned
* the last release was in 2009, before MRI 1.9.2 was released, which
  means it is not encoding-aware
* it's also useful to use a test framework that us familiar to more
  potential contributors (and existing committers with poor memories)
require rdoc on all platforms to ensure the rake task is available
remove iconv from the specs

* iconv is always available on the platforms we officially target
* however it's NOT available on MRI 2.0.0, due for release in February
  2013. We will need to support that soon, so get our house in order
for some reason on jruby 1.7 the encodings here don't always match
these specs must load files as binary to ensure the encoding is marked correctly
MRI and jruby treat encodings differently when reading from a StringIO

* as long as the string that the StringIO wraps is marked as binary,
  then the behaviour will match
update deprecated rspec syntax

* be_close(.., ..) is now be_within(..).of(..)