Revert "Github: Wrong comparison of repository name"

This reverts commit a4190684f3e5f2e3fa21220f0a03fc8f794e0682 which
introduced a regression issue causing the plugin to fail retrieving the
data from the post_receive hook.

This is due to using the wrong repository attribute to compare with the
repository name in the payload ('name' instead of 'info/hub_reponame').

Fixes #55
Fix whitespace
gitignore: added *.bak
Github: improve error handling

Print a more detailed error message when failing to retrieve a valid
JSON payload from Github.

This will hopefully facilitate troubleshooting of issues such as #56 in
the future.
Github: bump version number and minimum requirement

We now require MantisBT 1.2.16
Fixed missing 'plugin_Source_import_latest_failed' string in strings_english.txt. Issue #57
Merge pull request #58 from morgant/ImportLatestFailedMissingString

Fixed missing 'plugin_Source_import_latest_failed' string in strings_english.txt
Updated README.md to clarify SourceGithub requirement for unreleased/patched version of Mantis.
Merge pull request #59 from morgant/SourceGithubRequirementsNote

Updated README.md to clarify SourceGithub requirement for unreleased/patched version of Mantis.
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Create strings_spanish.txt
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