Remove the information linked to Eclipse projects from the repo

This information is not linked to the project and specific to one IDE
Fix some comments
Add a check in MultiThreadIntentService for the maximumNumberOfThreads

There was no check that the number of threads was strictly positive. It's
now the case.
Add a delay before stopping the Service

This patch ensures the MultiThreadedIntentService won't stop itself
as soon as no task needs to be processed. By waiting for 30 seconds,
the system may reuse the Service once a new task is sent. As a
consequence, this patch may relieve the system from instantiating
new Services over and over again
Activate ACRA only on release

This way when people modify the library for tests, ACRA will not notify
their crashes if they do some weird modifications in the application
Add a missing test in the equals method and fix a comment in Request

The equals method in Request was not checking that the request type was
the same.

Also a comment was wrong in the same class
Update version to 7/2.1.2