Version 1.3.5

Preserve .c and .h files (twitchtv#31)

* Preserve .c and .h files

* Only test sqlite behavior on non-windows platforms

* Use a constant list of preserved file endings

* Bump to version 1.3.4

Version 1.3.3

Version 1.3.2

Merge branch 'master' of github.com:twitchtv/retool

Run retool tests in parallel (twitchtv#22)

Version v1.2.0 (twitchtv#16)

Version 1.2.0

* Stop using a cache (twitchtv#12)

The cache was well-intentioned, but caused lots of tricky bugs. It could
get polluted with bad versions of dependencies, for example, and its
existence was always hard to justify.

* Fix gometalinter (twitchtv#15)

Fixes retool to support github.com/alecthomas/gometalinter. The 
`retool do` command now appends the `_tools` directory to `GOPATH`
when it runs subcommands, and it sets `GOBIN` to `_tools/bin`. In 
addition, when syncing, retool will preserve the linters vendored by 
gometalinter in its `_linters` directory, so `retool do gometalinter` will
work without hassle.

Keep legal files when vendoring tools (twitchtv#8)

* Keep legal files when vendoring tools

* Bump version to v1.1.0

* Use a broader pile of legal file hints

Use filepath, not path, for OS compatibility

Run 'go get' a second time after setting the version