Link text for the latest stable version changed.

A 1-character change, but the latest version is now 0.4.2 (I believe).
Merge pull request #841 from lenards/master

Updated link text for the latest stable version.
Merge pull request #843 from ShusenLiu/master

Fix bug where hadoop_bin path is not correct in WinOS
Update Hadoop link in README. Fixes #694.
Fixing a typo in option name in docs

Doc mentions "--ec2_instance_type" for command line invocation, but the option is actually "--ec-instance-type" (hyphen, not underscore) for command line.
Merge pull request #854 from darthvadar/patch-1

Fixing a typo in option name in docs
Give better error message if keyfile is missing
Fixed virtualenv sample script

virtualenv should be created if the venv directory *does not* exist (now it did the opposite -- created it if it existed!).
Merge pull request #862 from santtu/patch-3

Fixed virtualenv sample script
Merge pull request #858 from sketchytechky/improve_nokeyfile_error_msg

Give better error message if keyfile is missing
Add --emr-api-param and --no-emr-api-param options.
Added tests for --emr-api-params and --no-emr-api-params.
Added docs for --emr-api-params and --no-emr-api-params.
Fixed docs for --emr-api-params and --no-emr-api-params.
Update EMR tool ISO8601 parsing to be consistent with EMR runner.
Adding option to specify IAM job flow role to use with EMR cluster

(see http://docs.aws.amazon.com/ElasticMapReduce/latest/DeveloperGuide/emr-iam-roles.html for more info on using IAM roles in EMR)
Merge pull request #867 from anusha-r/iam-role-1

Adding option to specify IAM job flow role to use with EMR cluster
Fix typos.
Remove internal no_emr_api_params parameter. --no-api-param switch is still available.
emr_api_params overrides all other parameters.
Modify mockboto to generate ISO8601 date times with milliseconds.

Making this change resulted in some test failures, so there are
additional changes to make the tests pass:
 * move iso8601_to_* functions to new file mrjob/conversions.py
   (this breaks a dependency loop between mrjob/emr.py and
   mrjob/pool.py)
 * change mrjob/pool.py to use iso8601_to_datetime
 * update reference to mrjob.emr.iso8601_* to
   mrjob.conversions.iso8601_*.
#863 EMR AMIs 3.0.x use yum, not apt-get.