Fixed Python setup bug. Now the setup script works with Python version 2.6+
InternalTarget stores original dep. addresses

Useful for inspecting the dependency graph, which otherwise
throws away knowledge of JarLibrary and "dependencies" nodes

Also register "dependency_addresses" on JarLibraries
Add goals which find dep paths between two targets
Lint fix + dep analysis fix.

- Fixed bug in reporting missing deps on synthetic targets.
  Synthetic targets frequently create trivial dependency cycles. (like
  specific message types depend on "messageset", and "messageset" depends
  on the message types) In order to avoid tripping the cycle detector, they
  don't declare the deps that cause the cycle. As a result, we shouldn't
  report missing deps errors that don't break a compile for synthetic targets.
- Added support for intransitive dependency to fixlint.

Auditors: benjy
Lint fix + dep analysis fix.

- Fixed bug in reporting missing deps on synthetic targets.
  Synthetic targets frequently create trivial dependency cycles. (like
  specific message types depend on "messageset", and "messageset" depends
  on the message types) In order to avoid tripping the cycle detector, they
  don't declare the deps that cause the cycle. As a result, we shouldn't
  report missing deps errors that don't break a compile for synthetic targets.
- Added support for intransitive dependency to fixlint.
Merge branch "lintfix" back to master.
fix pants command and add a link to homepage
Merge pull request #131 from imsut/README_update.2

fix pants command and add a link to homepage
Merge branch 'master', remote-tracking branch 'origin'
Merge remote-tracking branch 'twitter/master'
Updated file following feedback from @jsirois.

1. PY variable handles the path to python.
Fixed one line that I left out by mistake: python -> $PY.
Merge pull request #129 from hwasungmars/master

Minor bugfix on Python version detection.
Merge pull request #130 from ryan-williams/paths

Add "path" and "paths" goals for finding dependency paths between targets
add default arg for context.py requested_goals
Merge pull request #132 from ryan-williams/default-arg-fix

add default arg for context.py requested_goals