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Remove special offset handling for EOFs.

They can just use the position provided by the lexer.
Merge pull request #749 from michaelpj/sign-agreement

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Merge pull request #738 from michaelpj/fix/eof-offsets

Fix character offsets for EOFs after newlines
add self to contributors.txt
Merge pull request #750 from bdkearns/sign
bild.py set java version from env var rather than hardcode
add bild.py outputs to .gitignore
fix srcdir for junit call
use OrderedDict for TARGETS so they are built in a repeatable order
fix classpath for tests
use default paths for pythons unless set in env var
add mkdist command to bild