adding support for uploading proguard mapping.txt file (via uploadProguardMapping property)
updating readme.md
fixing bug where using a signing config with different passwords for the key and the keystore would hang in the resigning step (due to the jarsigner command waiting for input)
Merge branch 'cavey79-master'
Ignore IntelliJ project files
Support for upload of proguard mapping file in newer Android Plugin versions
Support for proxy via http.proxy settings
Bumped version to 0.10