为了让Aptana支持GitHub，需要安装Egit，但在的时候碰到两个错误,一个是关于缺少EGit Mylyn另一个是缺少org.eclipse.egit.import.feature.group。
缺少Egit Mylyn的提示：
Cannot complete the install because one or more required items could not be found.
Software being installed: EGit Mylyn 1.1.0.201109151100-r (org.eclipse.egit.mylyn.feature.group 1.1.0.201109151100-r)
Missing requirement: EGit Mylyn 1.1.0.201109151100-r (org.eclipse.egit.mylyn.feature.group 1.1.0.201109151100-r) requires ‘org.eclipse.mylyn.team_feature.feature.group 3.5.0′ but it could not be found.
缺少org.eclipse.egit.import.feature.group的提示：
Cannot complete the install because one or more required items could not be found.
Software being installed:
EGit Import Support 2.0.0.201206130900-r (org.eclipse.egit.import.feature.group 2.0.0.201206130900-r) Missing requirement:
EGit Import Support 2.0.0.201206130900-r (org.eclipse.egit.import.feature.group 2.0.0.201206130900-r) requires
‘org.eclipse.team.core 3.6.100′ but it could not be found
Cannot complete the install because one or more required items could not be found.
Software being installed: Eclipse Git Team Provider 3.0.1.201307141637-r (org.eclipse.egit.feature.group 3.0.1.201307141637-r)
Missing requirement: Git Team Provider UI 3.0.1.201307141637-r (org.eclipse.egit.ui 3.0.1.201307141637-r) requires ‘bundle org.eclipse.team.core [3.6.100,4.0.0)' but it could not be found
Cannot satisfy dependency:
From: Eclipse Git Team Provider 3.0.1.201307141637-r (org.eclipse.egit.feature.group 3.0.1.201307141637-r)
To: org.eclipse.egit.ui [3.0.1.201307141637-r]
解决这两个问题，很简单：
只要取消EGit Mylyn和EGit Import Support这两个功能能就可以了。因为这两个功能都是可选的。不会影响使用GitHub。