Fetch targets when Buck tool window firstly shown.

Summary:
This diff involves 3 changes:
1. Fetch targets (only once) on Buck tool windows shown.
2. Decrease colspan of panel from 3 to 1.
3. Do not fetch again if targets are being fetched.

Test Plan:
Run IntelliJ with this plugin and click Buck tool window on the right.
The targets will be fetched automatically.
4 files changed
tree: c00957b175f41b834a0ad17e3d0bf3dd33dde655
  1. .idea/
  2. bin/
  3. config/
  4. docs/
  5. lib/
  6. plugin/
  7. pmd/
  8. scripts/
  9. src/
  10. test/
  11. testdata/
  12. third-party/
  13. .buckconfig
  14. .classpath
  15. .gitignore
  16. .project
  17. buck.iml
  18. build.xml
  19. DEFS
  20. LICENSE
  21. README.md
README.md

Buck

Buck is an Android build tool. To see what Buck can do for you, check out the documentation at http://facebook.github.io/buck/.

Installation

To build Buck, run the following:

git clone git@github.com:facebook/buck.git
cd buck
ant
./bin/buck --help

License

Apache License 2.0