RFR: JDK-8264838: IGV: enhance graph export functionality [v2]

[Nils Eliasson]

> Hi,
> 
> This patch adds SVG and searchable PDF export functionality to IGV. 
> 
> It's originally contributed by rcastanedalo at openjdk.java.net.
> I have updated the patch with new library versions, rebased and tested it.
> 
> Please review,
> Nils Eliasson

Nils Eliasson has updated the pull request incrementally with one additional commit since the last revision:

  Clean up

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6564/files
  - new: https://git.openjdk.java.net/jdk/pull/6564/files/607a5d19..14378ddc

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6564&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6564&range=00-01

  Stats: 12 lines in 2 files changed: 2 ins; 8 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6564.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6564/head:pull/6564

PR: https://git.openjdk.java.net/jdk/pull/6564