Modify .travis.yml

Test on different Python versions, also run pep8 and pyflakes.

.travis.yml

@@ -1,26 +1,33 @@
-language: c
+language: python
 sudo: false
 
 cache:
   directories: cache
 
-matrix:
-  include:
-    - compiler: ": Lua 5.1"
-      env: LUA="lua 5.1"
-    - compiler: ": Lua 5.2"
-      env: LUA="lua 5.2"
-    - compiler: ": Lua 5.3"
-      env: LUA="lua 5.3"
-    - compiler: ": LuaJIT 2.0"
-      env: LUA="luajit 2.0"
-    - compiler: ": LuaJIT 2.1"
-      env: LUA="luajit 2.1"
+python:
+  - "2.6"
+  - "2.7"
+  - "3.0"
+  - "3.5"
+
+before_install:
+  - pip install pyflakes
+  - pip install pep8
+
+before_script:
+  - pyflakes .
+  - pep8 . --max-line-length 99 --ignore E302
 
 script:
-  - python hererocks.py here --$LUA -r^ --downloads cache --builds cache
+  - python hererocks.py here -l 5.3 -r^ --downloads cache --builds cache
   - export PATH=$PATH:$PWD/here/bin
   - lua -v
   - luarocks --version
   - luarocks make
   - hererocks-test
+  - rm here -r
+  - python hererocks.py here -j 2.1 -r^ --downloads cache --builds cache
+  - lua -v
+  - luarocks --version
+  - luarocks make
+  - hererocks-test