use tox deps instead of "manual" pip install; add lucid and precise environments to tox.ini

.travis.yml

@@ -8,6 +8,7 @@ env:
     - BUILDENV=latest
 install:
     - pip install --use-mirrors -r .travis/requirements-$BUILDENV.txt
+    - pip install .
 script:
     - trial scrapy
 branches:

.travis/requirements-latest.txt

@@ -3,4 +3,3 @@ lxml
 twisted
 boto
 Pillow
-.

.travis/requirements-lucid.txt

@@ -4,4 +4,3 @@ lxml==2.2.4
 twisted==10.0.0
 boto==1.9b
 Pillow<2.0
-.

.travis/requirements-precise.txt

@@ -4,4 +4,3 @@ lxml==2.3.2
 twisted==11.1.0
 boto==2.2.2
 Pillow<2.0
-.

tox.ini

@@ -4,9 +4,20 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py26, py27
+envlist = py26, py27, lucid, precise
 
 [testenv]
+deps =
+    -r{toxinidir}/.travis/requirements-latest.txt
 commands =
-    pip install --use-mirrors -r .travis/requirements-latest.txt
     trial {posargs:scrapy}
+
+[testenv:lucid]
+basepython = python2.6
+deps =
+    -r{toxinidir}/.travis/requirements-lucid.txt
+
+[testenv:precise]
+basepython = python2.7
+deps =
+    -r{toxinidir}/.travis/requirements-precise.txt