* add logical part for global time filters from partition problem

* Update README.md, doc, dependency version pom, .travis.yml

* modify scala version to 2.11.8 and restrict java version to 8, change scalatest version from 2.12 to 2.1

* refactor query resource count

* format code

* fix a bug

* remove lock

* fix in proper hashcode methods in processors

try to release memory asap in ReadOnlyMemChunk

* BufferWriteProcessor: remove fileName (because insertFilePath is enough)

* TsFileResource: remove relativePath; using autoRead for automatically initialize startTimeMap and endTimeMap

* IMemTable, AbstractMemTable: add returned value of delete()
* TsRecord: change dataPoints from List to Array. And in many other classes, if Array is enough, then replace List<> by Array.

* For insertion, add a new method write(long time, Object value) to replace write(long time, String value), because the latter has to call a switch-case and something like Integer.valueOf(value).

* move recovery function from TsFileSequenceReader to its subclass

* add append option in TsFile writer and add a subclass of TsFileSequenceReader for supporting auto repair

* fix stream unclosed when exception occurs when creating TsFileReader

* reject writes when the memory is dangerous

* faster memtable.getSortedTimeValuePairList

* reduce memory cost when sorting data in memory

* fix equals() method in InsertPlan

* make TsFileWriter as AutoClosable; make TsFileReadWriteTest more concise

* make stop tsfileProcess more safe

* add DisabledMemController

* fix method name

* reuse BufferWriteProcessor and OverflowProcessor to reduce memory waste.

* fix initialized isClose

* fix reopen

* fix closed Overflowprocessor calling switchWorkToMerge

* reimplement MTree.toString() by JSON
add MManager.combineMetadataInStrings(String[] metadatas) for cluster module

* move add TIMESERIES HEADER from MGraph to TSServiceImpl
fix bug when MTree combine JSONObjects

* update timeseries metadata format in docs

supporting travis + win +jdk8

* fix that the damaged log will be skipped if it is the only log

* add error log

* fix test

print apache-rat violation result on console

set parsing incorrect cmd as tracing level log in ParseDriver; set TsserviceImple failed executing as info leve log (#153)

* make TsFileWriter as AutoClosable; make TsFileReadWriteTest more concise

[IOTDB-82] close TsFileInput before remove the tsfile

[IOTDB-81]update travis for supporting JDK11 on Win

* add java doc
enhance concurrency
refine some naming
add more specific logs

* fix invalid write when memory usage level is dangerous in BufferWriteProcessor
add shutdown hook to report memory usage

* undo time update when insertion failed

* complete undo logic

* remove undo in exception

* fix an unproperly initialized var

* add feature get for merge result, handle the merge exception

* fix invalid write when memory usage level is dangerous in BufferWriteProcessor

* add shutdown hook to report memory usage

* undo time update when insertion failed

* add a log appender: put info, ware, error log into one file; disable the log_info file

* fix the future instance is replaced when the flush frequency is high

* throw exception when flushing failed

* throw exception when flushing failed

* bug fix: version files of different storage groups are placed into the same place.

* add -B to mvn

* fix_bug_of_read_with_filter

* add hasCachedRowRecord

replace renameTo() with FileUtils.moveFile()

remove system.exit() on Test for better checking the problem when running test

add_create_ts_operator and add grant and revoke for create timeseries

[IOTDB-37]A WAL check tool script is desired