Added support for uploading files.
Merge branch 'master' into v0.2dev

Conflicts:
	api_client.py
Merge branch 'master' into v0.2dev

Conflicts:
	api_client.py
Merge branch 'master' into v0.2dev
Create tmp directory if not available galah/#197
Merge remote-tracking branch 'upstream/v0.2dev' into v0.2dev
Fixed long line in documentation.
Added documentation for get_csv.

* Fixes galah-group/galah#214
Merge branch 'v0.2dev' of github.com:galah-group/galah-apiclient into v0.2dev
Fixed broken link in README.

* Fixes galah-group/galah#226
Fixed spelling error for galah-group/galah#195
Changed user to assignment galah-group/galah#203
Ensure cookie jar is created with 600 perms.
Merge remote-tracking branch 'upstream/v0.2dev' into v0.2dev
Remove /tmp from possible cookiejar locations.
Make -c option persistent when used with -s.

* If a config file is passed as an option, it overwrites the environment path.
Relicensed under Apache License v2.
Moved configuration into its own module.
index on v0.2dev: 2f6a264 Moved configuration into its own module.
WIP on v0.2dev: 2f6a264 Moved configuration into its own module.