Load path of git command from redmine config
Merge pull request #41 from yujideveloper/master

load path of git command from configuration.yml
Add a few troubleshooting tips
Add some troubleshooting tips [ci skip]
Fix formatting and spelling of GitHub [ci skip]
RDoc -> Markdown [ci skip]
Update instructions to the new Webhook UI
changes single quotations in command line to double quotations for Windows not to fail parsing the line.
changes single quotations　more.
Merge pull request #48 from yuba/support-windows

changes single quotations in command line to double quotations
404 is a better response than 500 when a Project isn't found
uses Dir.chdir instead of --git-dir

It is hard to handle special characters appropriately to maintain --git-dir option dynamically.
So repository directory should be given as current directory, instead of command line option.
Dir.chdir-with-block takes effect only in the trailing block.
Limit directory-changing to a single method
Release version 2.0.0

This plugin has been around for a while and in production in many Redmine
installations. The current 0.2.0 version didn't do this justice.

Bumping all the way to 2.x to signal the compatibility with Redmines 2.x line.
Going forward major version numbers should follow Redmines major versions.
Gemify

This should allow you to install the plugin as a gem, simply by adding it to
your Gemfile.local before bundling.
Update installation instructions
Make sure plugin-based installations keep working. Fixes #52

`gemspec by default uses the path . when looking for the gemspec. That's fine
`when it's being bundled on its own, but when bundling via Redmines Gemfile, "."
`refers to the path to the Redmine installation.

Without this change, Redmine installations having the plugin installed directly
in plugins/redmine_github_hook would get an error like

> There are no gemspecs at /Users/jakob/Projects/redmine/redmine-2.5.

when starting Redmine (or when starting Bundler, really)
add plugin URL and author URL
installation hints
Merge pull request #53 from tofi86/master

init.rb changes and installation hints