* Version changes: current dev version is now 0.5.0
* This change permit to have multi branches with various versions
* Dev version is 0.5.0-dev and next release will be 0.5.0
The old Ant build system has been deprecated for a while and new development is focused on Gradle.
I also removed a hardcoded string that lint caught and moved the patch files to a subdirectory.
I left the JNI files in the root directory.
This fixes the problem where 0.4.12-dev versions were erroneously shown as
0.4.11-dev because the tag was added on a separate branch. It also fixes a
similar issue when builders didn't fetch new tags when updating.
This also removes the number-of-commits-since-tag field, since it's
incompatible with this. Said field doesn't seem to be useful anyway if you
have the commit hash.
