Use pip2 instead of pip

seafile-server.install

@@ -3,20 +3,20 @@ pre_install() {
     virtualenv2 --relocatable /usr/lib/seafile/seafileenv
     source /usr/lib/seafile/seafileenv/bin/activate
 
-    pip install chardet
-    pip install simplejson
-    pip install six
-    pip install python-dateutil
-    pip install django-pipeline
-    pip install "Django>=1.5.8,<1.6"
-    pip install http://effbot.org/media/downloads/PIL-1.1.7.tar.gz
-    pip install "https://github.com/djblets/djblets/archive/release-0.6.14.zip#egg=Djblets"
-    pip install "Pillow>=2.6.1,<3.0.0"
-    pip install gunicorn
-    pip install "django-compressor==1.4"
-    pip install "django-statici18n==1.1.2"
-    pip install "git+git://github.com/haiwen/django-constance.git@bde7f7cdfd0ed1631a6817fd4cd76f37bf54fe35#egg=django-constance[database]"
-    pip install "openpyxl==2.3.0"
+    pip2 install chardet
+    pip2 install simplejson
+    pip2 install six
+    pip2 install python-dateutil
+    pip2 install gunicorn
+    pip2 install "Django>=1.5.8,<1.6"
+    pip2 install django-pipeline
+    pip2 install http://effbot.org/media/downloads/PIL-1.1.7.tar.gz
+    pip2 install "https://github.com/djblets/djblets/archive/release-0.6.14.zip#egg=Djblets"
+    pip2 install "Pillow>=2.6.1,<3.0.0"
+    pip2 install "django-compressor==1.4"
+    pip2 install "django-statici18n==1.1.2"
+    pip2 install "git+git://github.com/haiwen/django-constance.git@bde7f7cdfd0ed1631a6817fd4cd76f37bf54fe35#egg=django-constance[database]"
+    pip2 install "openpyxl==2.3.0"
 
     deactivate
 }