The git integration in pull can have better commit messages using the resource history from wavefront server

Empieza rastreando el comando pull --inGit y el historial de Git generado; después, inspecciona el endpoint de versiones de Wavefront v2 descrito en el issue. Se considera terminado cuando los mensajes de commit generados incluyen el autor y la hora de modificación de cada cambio de recurso, en lugar de incluir únicamente el texto genérico del comando pull.

Right now the git integration with the pull command results in commit messages like this

hbaba@mbp-005063:~/misc/wavefront ((HEAD detached at d638aa8))$ git lola
* dbee3c1 () [2018-01-20 23:46:46 -0800]  (master, 2018-01-20--23-48-23-pull-branch, 2018-01-20--23-47-43-pull-branch, 2018-01-20--23-46-34-pull-branch) Added files due to pull <resource> cmd:/Users/hbaba/box/src/skynet/wavectl/wavectl/main.py pull --inGit /Users/hbaba/misc/wavefront alert
* d638aa8 () [2018-01-20 23:37:10 -0800]  (HEAD, 2018-01-20--23-37-00-pull-branch) Added files due to pull <resource> cmd:/Users/hbaba/box/src/skynet/wavectl/wavectl/main.py pull --inGit /Users/hbaba/misc/wavefront alert
* e8def81 () [2018-01-20 23:36:12 -0800]  (2018-01-20--23-35-57-pull-branch) Added files due to pull <resource> cmd:/Users/hbaba/box/src/skynet/wavectl/wavectl/main.py pull --inGit /Users/hbaba/misc/wavefront alert
* e570f08 () [2018-01-20 23:28:26 -0800]  (2018-01-20--23-28-15-pull-branch) Added files due to pull <resource> cmd:/Users/hbaba/box/src/skynet/wavectl/wavectl/main.py pull --inGit /Users/hbaba/misc/wavefront alert
* 443b4b8 () [2018-01-20 23:27:04 -0800]  (2018-01-20--23-26-49-pull-branch) Added files due to pull <resource> cmd:/Users/hbaba/box/src/skynet/wavectl/wavectl/main.py pull --inGit /Users/hbaba/misc/wavefront alert
* 380738b () [2018-01-20 23:25:17 -0800]  (2018-01-20--23-25-04-pull-branch) Added files due to pull <resource> cmd:/Users/hbaba/box/src/skynet/wavectl/wavectl/main.py pull --inGit /Users/hbaba/misc/wavefront alert
* 539efc1 () [2018-01-20 23:23:48 -0800]  (2018-01-20--23-23-33-pull-branch) Added files due to pull <resource> cmd:/Users/hbaba/box/src/skynet/wavectl/wavectl/main.py pull --inGit /Users/hbaba/misc/wavefront alert
* f504619 () [2018-01-20 23:23:33 -0800]  (1970-01-01--00-00-00-pull-branch) Initial commit with the README.md file```


This is not very useful to the users. 

The v2 api of Wavefront has a "versions" endpoint. There the time and the author for each change to each resource can be seen. 

It would be very very cool if the generated git history  could read the version history for each resoruce from wavefront and mention the authors, and the modification times in the commit messages. 

With that the resulting git repo in `pull --inGit ` command would be much more useful.