build/ already matches all directories named 'build' in the repository,
regardless of level. Gradle can have more than two levels of project nesting.
However, /*/build/ matches only the 'build' directories of 2nd-level projects.
Thus, the first pattern is more appropriate than the second.
The .project and important .classpath files are a part of an Android Eclipse
project, and their changes should be stored in the repository. Although there
may be a case for ignoring these files in very rare situations, they don't
justify belonging in a generic template.
The .project file is generally recreatable with a new import without
difficulty, but it still may have important configuration such as extra build
steps. More importantly, .classpath is absolutely essential for a project to
build correctly and cannot be automatically generated unless there is nothing
extra on the classpath.
Reverts commit 3ad9edaa2.
